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How to Write an Academic Essay with References and Citations

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If you're wondering how to write an academic essay with references, look no further. In this article, we'll discuss how to use in-text citations and references, including how to cite a website, how to cite a book, and how to cite a Tweet, according to various style guides.

You might need to cite sources when writing a paper that references other sources. For example, when writing an essay, you may use information from other works, such as books, articles, or websites. You must then inform readers where this information came from. Failure to do so, even accidentally, is plagiarism—passing off another person's work as your own.

You can avoid plagiarism and show readers where to find information by using citations and references. 

Citations tell readers where a piece of information came from. They take the form of footnotes, endnotes, or parenthetical elements, depending on your style guide. In-text citations are usually placed at the end of a sentence containing the relevant information. 

A reference list , bibliography, or works cited list at the end of a text provides additional details about these cited sources. This list includes enough publication information allowing readers to look up these sources themselves.

Referencing is important for more than simply avoiding plagiarism. Referring to a trustworthy source shows that the information is reliable. Referring to reliable information can also support your major points and back up your argument. 

Learning how to write an academic essay with references and how to use in-text citations will allow you to cite authors who have made similar arguments. This helps show that your argument is objective and not entirely based on personal biases.

How Do You Determine Which Style Guide to Use?

Often, a professor will assign a style guide. The purpose of a style guide is to provide writers with formatting instructions. If your professor has not assigned a style guide, they should still be able to recommend one. 

If you are entirely free to choose, pick one that aligns with your field (for example, APA is frequently used for scientific writing). 

Some of the most common style guides are as follows:

AP style for journalism

Chicago style for publishing

APA style for scholarly writing (commonly used in scientific fields)

MLA style for scholarly citations (commonly used in English literature fields)

Some journals have their own style guides, so if you plan to publish, check which guide your target journal uses. You can do this by locating your target journal's website and searching for author guidelines.

How Do You Pick Your Sources?

When learning how to write an academic essay with references, you must identify reliable sources that support your argument. 

As you read, think critically and evaluate sources for:

Objectivity

Keep detailed notes on the sources so that you can easily find them again, if needed.

Tip: Record these notes in the format of your style guide—your reference list will then be ready to go.

How to Use In-Text Citations in MLA

An in-text citation in MLA includes the author's last name and the relevant page number: 

(Author 123)

How to Cite a Website in MLA

Here's how to cite a website in MLA:

Author's last name, First name. "Title of page."

Website. Website Publisher, date. Web. Date

retrieved. <URL>

With information from a real website, this looks like:

Morris, Nancy. "How to Cite a Tweet in APA,

Chicago, and MLA." Scribendi. Scribendi

Inc., n.d. Web. 22 Dec. 2021.

<https://www.scribendi.com/academy/articles/how_to_cite_a_website.en.html>

How Do You Cite a Tweet in MLA ?

MLA uses the full text of a short Tweet (under 140 characters) as its title. Longer Tweets can be shortened using ellipses. 

MLA Tweet references should be formatted as follows:

@twitterhandle (Author Name). "Text of Tweet." Twitter, Date Month, Year, time of

publication, URL.

With information from an actual Tweet, this looks like:

@neiltyson (Neil deGrasse Tyson). "You can't use reason to convince anyone out of an

argument that they didn't use reason to get into." Twitter, 29 Sept. 2020, 10:15 p.m.,

https://twitter.com/neiltyson/status/1311127369785192449 .

How to Cite a Book in MLA

Here's how to cite a book in MLA:

Author's last name, First name. Book Title. Publisher, Year.

With publication information from a real book, this looks like:

Montgomery, L.M. Rainbow Valley. Frederick A. Stokes Company, 1919.

How to Cite a Chapter in a Book in MLA

Author's last name, First name. "Title of Chapter." Book Title , edited by Editor Name,

Publisher, Year, pp. page range.

With publication information from an actual book, this looks like:

Ezell, Margaret J.M. "The Social Author: Manuscript Culture, Writers, and Readers." The

Broadview Reader in Book History , edited by Michelle Levy and Tom Mole, Broadview

Press, 2015,pp. 375–394.

How to  Cite a Paraphrase in MLA

You can cite a paraphrase in MLA exactly the same way as you would cite a direct quotation. 

Make sure to include the author's name (either in the text or in the parenthetical citation) and the relevant page number.

How to Use In-Text Citations in APA

In APA, in-text citations include the author's last name and the year of publication; a page number is included only if a direct quotation is used: 

(Author, 2021, p. 123)

How to Cite a Website in APA

Here's how to cite a website in APA:

Author, A. A., & Author, B. B. (Year, Month. date of publication). Title of page. https://URL

Morris, N. (n.d.). How to cite a Tweet in APA, Chicago, and MLA. 

https://www.scribendi.com/academy/articles/how_to_cite_a_website.en.html       

Tip: Learn more about how to write an academic essay with  references to websites .

How Do You  Cite a Tweet in APA ?

APA refers to Tweets using their first 20 words. 

Tweet references should be formatted as follows:

Author, A. A. [@twitterhandle). (Year, Month. date of publication). First 20 words of the

Tweet. [Tweet] Twitter. URL

When we input information from a real Tweet, this looks like:

deGrasse Tyson, N. [@neiltyson]. (2020, Sept. 29). You can't use reason to convince anyone

out of an argument that they didn't use reason to get into. [Tweet] Twitter.

https://twitter.com/neiltyson/status/1311127369785192449

How to Cite a Book in APA

Here's how to cite a book in APA:   

Author, A. A. (Year). Book title. Publisher.

For a real book, this looks like:

Montgomery, L. M. (1919). Rainbow valley.

Frederick A. Stokes Company.

How to Cite a Chapter in a Book in APA

Author, A. A. (Year). Chapter title. In Editor Name (Ed.), Book Title (pp. page range).

With information from a real book, this looks like:

Ezell, M. J. M. (2014). The social author: Manuscript culture, writers, and readers. In

Michelle Levy and Tom Mole (Eds.), The Broadview Reader in Book History (pp. 375–

394). Broadview Press.

Knowing how to cite a book and how to cite a chapter in a book correctly will take you a long way in creating an effective reference list.

How to Cite a Paraphrase in APA

You can cite a paraphrase in APA the same way as you would cite a direct quotation, including the author's name and year of publication. 

In APA, you may also choose to pinpoint the page from which the information is taken.

Referencing is an essential part of academic integrity. Learning how to write an academic essay with references and how to use in-text citations shows readers that you did your research and helps them locate your sources.

Learning how to cite a website, how to cite a book, and how to cite a paraphrase can also help you avoid plagiarism —an academic offense with serious consequences for your education or professional reputation.

Scribendi can help format your citations or review your whole paper with our Academic Editing services .

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Hire an expert academic editor , or get a free sample, about the author.

Scribendi's in-house editors work with writers from all over the globe to perfect their writing. They know that no piece of writing is complete without a professional edit, and they love to see a good piece of writing transformed into a great one. Scribendi's in-house editors are unrivaled in both experience and education, having collectively edited millions of words and obtained numerous degrees. They love consuming caffeinated beverages, reading books of various genres, and relaxing in quiet, dimly lit spaces.

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How to Reference in an Essay (9 Strategies of Top Students)

Are you feeling overwhelmed by referencing?

When you’re first asked to do referencing in an essay it can be hard to get your head around it. If it’s been a while since you were first taught how to reference, it can be intimidating to ask again how to do it!

I have so many students who consistently lose marks just because they didn’t get referencing right! They’re either embarrassed to ask for extra help or too lazy to learn how to solve the issues.

So, here’s a post that will help you solve the issues on your own.

Already think you’re good at referencing? No worries. This post goes through some surprising and advanced strategies for anyone to improve no matter what level you are at!

In this post I’m going to show you exactly how to reference in an essay. I’ll explain why we do it and I’ll show you 9 actionable tips on getting referencing right that I’m sure you will not have heard anywhere else!

The post is split into three parts:

• What is a Reference and What is a Citation?
• Why Reference? (4 Things you Should Know)
• How to Reference (9 Strategies of Top Students)

If you think you’ve already got a good understanding of the basics, you can jump to our 9 Advanced Strategies section.

Part 1: What is a Reference and What is a Citation?

What is a citation.

An in-text mention of your source. A citation is a short mention of the source you got the information from, usually in the middle or end of a sentence in the body of your paragraph. It is usually abbreviated so as not to distract the reader too much from your own writing. Here’s two examples of citations. The first is in APA format. The second is in MLA format:

• APA: Archaeological records trace the original human being to equatorial Africa about 250,000–350,000 years ago (Schlebusch & Jakobsson, 2018) .
• MLA: Archaeological records trace the original human being to equatorial Africa about 250,000–350,000 years ago (Schlebusch and Jakobsson 1) .

In APA format, you’ve got the authors and year of publication listed. In MLA format, you’ve got the authors and page number listed. If you keep reading, I’ll give some more tips on formatting further down in this article.

And a Reference is:

What is a Reference?

A reference is the full details of a source that you list at the end of the article. For every citation (see above) there needs to be a corresponding reference at the end of the essay showing more details about that source. The idea is that the reader can see the source in-text (i.e. they can look at the citation) and if they want more information they can jump to the end of the page and find out exactly how to go about finding the source.

Here’s how you would go about referencing the Schlebusch and Jakobsson source in a list at the end of the essay. Again, I will show you how to do it in APA and MLA formats:

• APA: Schlebusch, C. & Jakobsson, M. (2018). Tales of Human Migration, Admixture, and Selection in Africa. Annual Review of Genomics and Human Genetics , 11 (33), 1–24.
• MLA: Schlebusch, Carina and Mattias Jakobsson. “Tales of Human Migration, Admixture, and Selection in Africa.” Annual Review of Genomics and Human Genetics , vol. 11, no. 33, 2018, pp. 1–24.

In strategy 1 below I’ll show you the easiest and fool proof way to write these references perfectly every time.

One last quick note: sometimes we say ‘reference’ when we mean ‘citation’. That’s pretty normal. Just roll with the punches. It’s usually pretty easy to pick up on what our teacher means regardless of whether they use the word ‘reference’ or ‘citation’.

Part 2: Why Reference in an Essay? (4 Things you Should Know)

Referencing in an essay is important. By the time you start doing 200-level courses, you probably won’t pass the course unless you reference appropriately. So, the biggest answer to ‘why reference?’ is simple: Because you Have To!

Okay let’s be serious though … here’s the four top ‘real’ reasons to reference:

1. Referencing shows you Got an Expert’s Opinion

You can’t just write an essay on what you think you know. This is a huge mistake of beginning students. Instead this is what you need to do:

Top Tip: Essays at university are supposed to show off that you’ve learned new information by reading the opinions of experts.

Every time you place a citation in your paragraph, you’re showing that the information you’re presenting in that paragraph was provided to you by an expert. In other words, it means you consulted an expert’s opinion to build your knowledge.

If you have citations throughout the essay with links to a variety of different expert opinions, you’ll show your marker that you did actually genuinely look at what the experts said with an open mind and considered their ideas.

This will help you to grow your grades.

2. Referencing shows you read your Assigned Readings

Your teacher will most likely give you scholarly journal articles or book chapters to read for homework between classes. You might have even talked about those assigned readings in your seminars and tutorials.

Great! The assigned readings are very important to you.

You should definitely cite the assigned readings relevant to your essay topic in your evaluative essay (unless your teacher tells you not to). Why? I’ll explain below.

• Firstly, the assigned readings were selected by your teacher because your teacher (you know, the person who’s going to mark your essay) believes they’re the best quality articles on the topic. Translation: your teacher gave you the best source you’re going to find. Make sure you use it!
• Secondly, by citing the assigned readings you are showing your teacher that you have been paying attention throughout the course. You are showing your teacher that you have done your homework, read those assigned readings and paid attention to them. When my students submit an essay that has references to websites, blogs, wikis and magazines I get very frustrated. Why would you cite low quality non-expert sources like websites when I gave you the expert’s article!? Really, it frustrates me so, so much.

So, cite the assigned readings to show your teacher you read the scholarly articles your teacher gave to you. It’ll help you grow your marks.

3. Referencing deepens your Knowledge

Okay, so you understand that you need to use referencing to show you got experts’ opinions on the topic.

But there’s more to it than that. There’s actually a real benefit for your learning.

If you force yourself to cite two expert sources per paragraph, you’re actually forcing yourself to get two separate pieces of expert knowledge. This will deepen your knowledge!

So, don’t treat referencing like a vanity exercise to help you gain more marks. Actually view it as an opportunity to develop deeper understandings of the topic!

When you read expert sources, aim to pick up on some new gems of knowledge that you can discuss in your essays. Some things you should look out for when finding sources to reference:

• Examples that link ideas to real life. Do the experts provide real-life examples that you can mention in your essay?
• Facts and figures. Usually experts have conducted research on a topic and provide you with facts and figures from their research. Use those facts and figures to deepen your essay!
• Short Quotes. Did your source say something in a really interesting, concise or surprising way? Great! You can quote that source in your essay .
• New Perspectives. Your source might give you another perspective, angle or piece of information that you can add to your paragraph so that it’s a deep, detailed and interesting paragraph.

So, the reason we ask you to reference is at the end of the day because it’s good for you: it helps you learn!

4. Referencing backs up your Claims

You might think you already know a ton of information about the topic and be ready to share your mountains of knowledge with your teacher. Great!

So, should you still reference?

Yes. Definitely.

You need to show that you’re not the only person with your opinion. You need to ‘stand on the shoulders of giants.’ Show what other sources have said about your points to prove that experts agree with you.

You should be saying: this is my opinion and it’s based on facts, expert opinions and deep, close scrutiny of all the arguments that exist out there .

If you make a claim that no one else has made, your teacher is going to be like “Have you even been reading the evidence on this topic?” The answer, if there are no citations is likely: No. You haven’t.

Even if you totally disagree with the experts, you still need to say what their opinions are! You’ll need to say: “This is the experts’ opinions. And this is why I disagree.”

So, yes, you need to reference to back up every claim. Try to reference twice in every paragraph to achieve this.

Part 3: Strategies for How to Reference in an Essay (9 Strategies of Top Students)

Let’s get going with our top strategies for how to reference in an essay! These are strategies that you probably haven’t heard elsewhere. They work for everyone – from beginner to advanced! Let’s get started:

1. Print out your Reference Style Cheat Sheet

Referencing is hard and very specific. You need to know where to place your italics, where the commas go and whether to use an initial for full name for an author.

There are so many details to get right.

And here’s the bad news: The automated referencing apps and websites nearly always get it wrong! They tell you they can generate the citation for you. The fact of the matter is: they can’t!

Here’s the best way to get referencing right: Download a referencing cheat sheet and have it by your side while writing your essay.

Your assignment outline should tell you what type of referencing you should use. Different styles include: APA Style, MLA Style, Chicago Style, Harvard Style, Vancouver Style … and many more!

You need to find out which style you need to use and download your cheat sheet. You can jump onto google to find a cheat sheet by typing in the google bar:

Download a pdf version of the referencing style cheat sheet, print it out, and place it on your pinboard or by your side when writing your essay.

2. Only cite Experts

There are good and bad sources to cite in an essay.

You should only cite sources written, critiqued and edited by experts. This shows that you have got the skill of finding information that is authoritative. You haven’t just used information that any old person popped up on their blog. You haven’t just gotten information from your local newspaper. Instead, you got information from the person who is an absolute expert on the topic.

Here’s an infographic listing sources that you should and shouldn’t cite. Feel free to share this infographic on social media, with your teachers and your friends:

3. Always use Google Scholar

Always. Use. Google. Scholar.

Ten years ago students only had their online university search database to find articles. Those university databases suck. They rarely find the best quality sources and there’s always a big mix of completely irrelevant sources mixed in there.

Google Scholar is better at finding the sources you want. That’s because it looks through the whole article abstract and analyses it to see if it’s relevant to your search keywords. By contrast, most university search databases rely only on the titles of articles.

Use the power of the best quality search engine in the world to find scholarly sources .

Note: Google and Google Scholar are different search engines.

To use Google Scholar, go to: https://scholar.google.com

Then, search on google scholar using keywords. I’m going to search keywords for an essay on the topic: “What are the traits of a good nurse?”

If you really like the idea of that first source, I recommend copying the title and trying your University online search database. Your university may give you free access.

4. Cite at least 50% sources you found on your Own Research

Okay, so I’ve told you that you should cite both assigned readings and readings you find from Google Scholar.

Here’s the ideal mix of assigned sources and sources that you found yourself: 50/50.

Your teacher will want to see that you can use both assigned readings and do your own additional research to write a top essay . This shows you’ve got great research skills but also pay attention to what is provided in class.

I recommend that you start with the assigned readings and try to get as much information out of them, then find your own additional sources beyond that using Google Scholar.

So, if your essay has 10 citations, a good mix is 5 assigned readings and 5 readings you found by yourself.

5. Cite Newer Sources

As a general rule, the newer the source the better .

The best rule of thumb that most teachers follow is that you should aim to mostly cite sources from the past 10 years . I usually accept sources from the past 15 years when marking essays.

However, sometimes you have a really great source that’s 20, 30 or 40 years old. You should only cite these sources if they’re what we call ‘seminal texts’. A seminal text is one that was written by an absolute giant in your field and revolutionized the subject.

Here’s some examples of seminal authors whose old articles you would be able to cite despite the fact that they’re old:

• Education: Vygotsky, Friere, Piaget
• Sociology: Weber, Marx, C. Wright Mills
• Psychology: Freud, Rogers, Jung

Even if I cite seminal authors, I always aim for at least 80% of my sources to have been written in the past 10 years.

6. Reference twice per Paragraph

How much should you reference?

Here’s a good strategy: Provide two citations in every paragraph in the body of the essay.

It’s not compulsory to reference in the introduction and conclusion . However, in all the other paragraphs, aim for two citations.

Let’s go over the key strategies for achieving this:

• These two citations should be to different sources, not the same sources twice;
• Two citations per paragraph shows your points are backed up by not one, but two expert sources;
• Place one citation in the first half of the paragraph and one in the second half. This will indicate to your marker that all the points in the whole paragraph are backed up by your citations.

This is a good rule of thumb for you when you’re not sure when and how often to reference. When you get more confident with your referencing, you can mix this up a little.

7. The sum total of your sources should be minimum 1 per 150 words

You can, of course, cite one source more than once throughout the essay. You might cite the same source in the second, fourth and fifth paragraphs. That’s okay.

But, you don’t want your whole essay to be based on a narrow range of sources. You want your marker to see that you have consulted multiple sources to get a wide range of information on the topic. Your marker wants to know that you’ve seen a range of different opinions when coming to your conclusions.

When you get to the end of your essay, check to see how many sources are listed in the end-text reference list. A good rule of thumb is 1 source listed in the reference list per 150 words. Here’s how that breaks down by essay size:

• 1500 word essay: 10 sources (or more) listed in the reference list
• 2000 word essay: 13 sources (or more) listed in the reference list
• 3000 word essay: 20 sources (or more) listed in the reference list
• 5000 word essay: 33 sources (or more) listed in the reference list

8. Instantly improve your Reference List with these Three Tips

Here’s two things you can do to instantly improve your reference list. It takes less than 20 seconds and gives your reference list a strong professional finish:

a) Ensure the font size and style are the same

You will usually find that your whole reference list ends up being in different font sizes and styles. This is because you tend to copy and paste the titles and names in the citations from other sources. If you submit the reference list with font sizes and styles that are not the same as the rest of the essay, the piece looks really unprofessional.

So, quickly highlight the whole reference list and change its font to the same font size and style as the rest of your essay. The screencast at the end of Step 8 walks you through this if you need a hand!

b) List your sources in alphabetical order.

Nearly every referencing style insists that references be listed in alphabetical order. It’s a simple thing to do before submitting and makes the piece look far more professional.

If you’re using Microsoft Word, simply highlight your whole reference list and click the A>Z button in the toolbar. If you can’t see it, you need to be under the ‘home’ tab (circled below):

You’ve probably never heard of a hanging indent. It’s a style where the second line of the reference list is indented further from the left-hand side of the page than the first line. It’s a strategy that’s usually used in reference lists provided in professional publications.

If you use the hanging indent, your reference list will look far more professional.

Here’s a quick video of me doing it for you:

9. Do one special edit especially for Referencing Style

The top students edit their essays three to five times spaced out over a week or more before submitting. One of those edits should be specifically for ensuring your reference list adheres to the referencing style that your teacher requires.

To do this, I recommend you get that cheat sheet printout that I mentioned in Step 1 and have it by your side while you read through the piece. Pay special attention to the use of commas, capital letters, brackets and page numbers for all citations. Also pay attention to the reference list: correct formatting of the reference list can be the difference between getting the top mark in the class and the fifth mark in the class. At the higher end of the marking range, things get competitive and formatting of the reference list counts.

A Quick Summary of the 9 Top Strategies…

Follow the rules of your referencing style guide (and that cheat sheet I recommended!) and use the top 9 tips above to improve your referencing and get top marks. Not only will your referencing look more professional, you’ll probably increase the quality of the content of your piece as well when you follow these tips!

Here’s a final summary of the 9 top tips:

Strategies for How to Reference in an Essay (9 Strategies of Top Students)

• Print out your Reference Style Cheat Sheet
• Only cite Experts
• Always use Google Scholar
• Cite at least 50% sources you found on your Own Research
• Cite Newer Sources
• Reference twice per Paragraph
• The sum total of your sources should be minimum 1 per 150 words
• Instantly improve your Reference List with these Three Tips
• Do one special edit especially for Referencing Style

Chris Drew (PhD)

Dr. Chris Drew is the founder of the Helpful Professor. He holds a PhD in education and has published over 20 articles in scholarly journals. He is the former editor of the Journal of Learning Development in Higher Education. [Image Descriptor: Photo of Chris]

• Chris Drew (PhD) https://helpfulprofessor.com/author/chris-drew-phd/ 5 Top Tips for Succeeding at University
• Chris Drew (PhD) https://helpfulprofessor.com/author/chris-drew-phd/ 50 Durable Goods Examples
• Chris Drew (PhD) https://helpfulprofessor.com/author/chris-drew-phd/ 100 Consumer Goods Examples
• Chris Drew (PhD) https://helpfulprofessor.com/author/chris-drew-phd/ 30 Globalization Pros and Cons

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Citing and referencing information can be daunting for students who do not understand the principles.

There are numerous ways to reference. Different institutions, departments or lecturers may require different styles so check with your teacher, lecturer or instructor if you are unsure.

Bad referencing is a common way for students to lose marks in assignments so it is worth taking the time and effort to learn how to reference correctly.

Why Do We Cite and Reference?

When writing any academic essay, paper, report or assignment, you need to highlight your use of other author's ideas and words so that you:

• Give the original author credit for their own ideas and work
• Validate your arguments
• Enable the reader to follow up on the original work if they wish to
• Enable the reader to see how dated the information might be
• Prove to your tutors/lecturers that you have read around the subject
• Avoid plagiarism

Referencing Styles

There are many different styles of referencing, including Harvard, APA (from the American Psychological Association), Chicago and Vancouver. The Harvard referencing system is of the most popular styles and the remainder of this article deals with this system. However, your university may prefer the use of a different system so check with your lecturer or in your course information as to which referencing style to use.

What is Plagiarism?

• Presenting another's ideas as if they are your own – either directly or indirectly
• Copying or pasting text and images without saying where they came from
• Not showing when a quote is a quote
• Summarising information without showing the original source
• Changing a few words in a section of text without acknowledging the original author

Plagiarism is a serious academic offence.  You are likely to be awarded 0% for an assignment which has evidence of plagiarism. If you continue to plagiarise then you may be excluded from your course.

Most universities will want a signed declaration with submitted work to say that you have not plagiarised. 

Universities use anti-plagiarism software to quickly find plagiarised work. This software usually draws on huge databases of web sources, books, journals and all previously submitted student work to compare your work to so you will be found out.

Therefore, if you plagiarise, you are likely to be caught so don't take the risk and reference properly.

Be Organised

When writing an essay, report, dissertation or other piece of academic work, the key to referencing is organisation. As you go along, keep notes of the books and journal articles you have read and the websites you have visited as part of your research process.

There are various tools to help here. Your university may be able to provide you with some specialist software (Endnote – www.endnote.com ) or you can simply keep a list in a document or try Zotero ( www.zotero.org ) a free plugin for the Firefox browser.

What Needs to be Recorded?

Record as much information as possible in references to make finding the original work simple.

Include the author/s name/s where possible. You should write the surname (last name) first followed by any initials.  If there are more than three authors then you can cite the first author and use the abbreviation 'et al', meaning 'and all'.

For one, two or three authors: Jones A, Davies B, Jenkins C

For more than three authors Jones A et al.

For some sources, especially websites, the name of the author may not be known. In such cases either use the organisation name or the title of the document or webpage.

Example:  SkillsYouNeed or What Are Interpersonal Skills.

Date of Publication

You should include the year of publication or a more specific date if appropriate, for journal or newspaper articles/stories. For webpages look for the when the page was last updated. Include dates in brackets (2020) after author information. If no date can be established, then put (no date).

Title of Piece

Include the title of the piece; this could be the name of the book, the title of a journal article or webpage. Titles are usually written in italics . For books you should also include the edition (if not the first) to make finding information easier. Often when books are republished information remains broadly the same but may be reordered, therefore page numbers may change between editions.

Publisher Information

Usually only relevant for books, but for these you should include the publisher name and place of publication.

Page Numbers

If you are referencing a particular part of a book, then you should include the page number/s you have used in your work. Use p. 123 to indicate page 123 or pp. 123-125 to indicate multiple pages.

URL and Date Accessed

For webpages you need to include the full URL of the page (http://www... etc.) and the date you last accessed the page. The web is not static and webpages can be changed/updated/removed at any time, so it is therefore important to record when you found the information you are referencing.

Once you have recorded the information, you have everything you need in order to reference correctly. Your work should be both referenced in the text and include a reference list or bibliography at the end. The in text reference is an abbreviated version of the full reference in your reference list.

Direct Quotes

If you are directly quoting in your text you should enclose the quote in quotation marks, and include author information:

"Communication is simply the act of transferring information from one place to another." SkillsYouNeed (2019)

For longer direct quotations it may be neater to indent the quotation in its own paragraph.

Your reference list should then include the full version of the reference:

SkillsYouNeed (2022) What is Communication? [online] available at www.skillsyouneed.com/ips/what-is-communication.html (Accessed October 14 2022)

For a book you would use, in your text:

“Long before the twelfth century rhetoricians had collected quotations, particularly from classical authors, into anthologies called florilegia…” (Clanchy, M.T, 1993)

The reference list would then include the full reference:

Clanchy, M.T. (1993) From Memory to Written Record England 1066 – 1307 Oxford, Blackwell, p. 115

The same rules also apply when you are referencing indirectly and you have not included a direct quote. If you have used the ideas of another source, reference both in your text at the relevant point and in your reference list or bibliography at the end of your document.

Further Reading from Skills You Need

The Skills You Need Guide for Students

Develop the skills you need to make the most of your time as a student.

Our eBooks are ideal for students at all stages of education, school, college and university. They are full of easy-to-follow practical information that will help you to learn more effectively and get better grades.

Additional Information

When quoting you may sometimes want to leave out some words , in which case use … (three dots).

"Communication is … transferring information from one place to another"

If you need to add words to a quote for clarity, then square brackets are used:

“Communication is simply the act [in communication skills] of transferring information from one place to another.”

You can use [sic] to note an original error and/or foreign spelling , SkillsYouNeed is a UK site and therefore uses UK spellings:

"The color [sic] of the water..."

Continue to: Common Mistakes in Writing Sources of Information

See Also: Note-Taking for Reading What is Theory? | Writing an Essay | Punctuation

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• Referencing

A Quick Guide to Referencing | Cite Your Sources Correctly

Referencing means acknowledging the sources you have used in your writing. Including references helps you support your claims and ensures that you avoid plagiarism .

There are many referencing styles, but they usually consist of two things:

• A citation wherever you refer to a source in your text.
• A reference list or bibliography at the end listing full details of all your sources.

The most common method of referencing in UK universities is Harvard style , which uses author-date citations in the text. Our free Harvard Reference Generator automatically creates accurate references in this style.

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Table of contents

Referencing styles, citing your sources with in-text citations, creating your reference list or bibliography, harvard referencing examples, frequently asked questions about referencing.

Each referencing style has different rules for presenting source information. For in-text citations, some use footnotes or endnotes , while others include the author’s surname and date of publication in brackets in the text.

The reference list or bibliography is presented differently in each style, with different rules for things like capitalisation, italics, and quotation marks in references.

Your university will usually tell you which referencing style to use; they may even have their own unique style. Always follow your university’s guidelines, and ask your tutor if you are unsure. The most common styles are summarised below.

Harvard referencing, the most commonly used style at UK universities, uses author–date in-text citations corresponding to an alphabetical bibliography or reference list at the end.

Harvard Referencing Guide

Vancouver referencing, used in biomedicine and other sciences, uses reference numbers in the text corresponding to a numbered reference list at the end.

Vancouver Referencing Guide

APA referencing, used in the social and behavioural sciences, uses author–date in-text citations corresponding to an alphabetical reference list at the end.

APA Referencing Guide APA Reference Generator

MHRA referencing, used in the humanities, uses footnotes in the text with source information, in addition to an alphabetised bibliography at the end.

MHRA Referencing Guide

OSCOLA referencing, used in law, uses footnotes in the text with source information, and an alphabetical bibliography at the end in longer texts.

OSCOLA Referencing Guide

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In-text citations should be used whenever you quote, paraphrase, or refer to information from a source (e.g. a book, article, image, website, or video).

Quoting and paraphrasing

Quoting is when you directly copy some text from a source and enclose it in quotation marks to indicate that it is not your own writing.

Paraphrasing is when you rephrase the original source into your own words. In this case, you don’t use quotation marks, but you still need to include a citation.

In most referencing styles, page numbers are included when you’re quoting or paraphrasing a particular passage. If you are referring to the text as a whole, no page number is needed.

In-text citations

In-text citations are quick references to your sources. In Harvard referencing, you use the author’s surname and the date of publication in brackets.

Up to three authors are included in a Harvard in-text citation. If the source has more than three authors, include the first author followed by ‘ et al. ‘

The point of these citations is to direct your reader to the alphabetised reference list, where you give full information about each source. For example, to find the source cited above, the reader would look under ‘J’ in your reference list to find the title and publication details of the source.

Placement of in-text citations

In-text citations should be placed directly after the quotation or information they refer to, usually before a comma or full stop. If a sentence is supported by multiple sources, you can combine them in one set of brackets, separated by a semicolon.

If you mention the author’s name in the text already, you don’t include it in the citation, and you can place the citation immediately after the name.

• Another researcher warns that the results of this method are ‘inconsistent’ (Singh, 2018, p. 13) .
• Previous research has frequently illustrated the pitfalls of this method (Singh, 2018; Jones, 2016) .
• Singh (2018, p. 13) warns that the results of this method are ‘inconsistent’.

The terms ‘bibliography’ and ‘reference list’ are sometimes used interchangeably. Both refer to a list that contains full information on all the sources cited in your text. Sometimes ‘bibliography’ is used to mean a more extensive list, also containing sources that you consulted but did not cite in the text.

A reference list or bibliography is usually mandatory, since in-text citations typically don’t provide full source information. For styles that already include full source information in footnotes (e.g. OSCOLA and Chicago Style ), the bibliography is optional, although your university may still require you to include one.

Format of the reference list

Reference lists are usually alphabetised by authors’ last names. Each entry in the list appears on a new line, and a hanging indent is applied if an entry extends onto multiple lines.

Different source information is included for different source types. Each style provides detailed guidelines for exactly what information should be included and how it should be presented.

Below are some examples of reference list entries for common source types in Harvard style.

• Chapter of a book
• Journal article

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Your university should tell you which referencing style to follow. If you’re unsure, check with a supervisor. Commonly used styles include:

• Harvard referencing , the most commonly used style in UK universities.
• MHRA , used in humanities subjects.
• APA , used in the social sciences.
• Vancouver , used in biomedicine.
• OSCOLA , used in law.

Your university may have its own referencing style guide.

If you are allowed to choose which style to follow, we recommend Harvard referencing, as it is a straightforward and widely used style.

References should be included in your text whenever you use words, ideas, or information from a source. A source can be anything from a book or journal article to a website or YouTube video.

If you don’t acknowledge your sources, you can get in trouble for plagiarism .

To avoid plagiarism , always include a reference when you use words, ideas or information from a source. This shows that you are not trying to pass the work of others off as your own.

You must also properly quote or paraphrase the source. If you’re not sure whether you’ve done this correctly, you can use the Scribbr Plagiarism Checker to find and correct any mistakes.

Harvard referencing uses an author–date system. Sources are cited by the author’s last name and the publication year in brackets. Each Harvard in-text citation corresponds to an entry in the alphabetised reference list at the end of the paper.

Vancouver referencing uses a numerical system. Sources are cited by a number in parentheses or superscript. Each number corresponds to a full reference at the end of the paper.

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IOE Writing Centre

Referencing FAQs

As Hyland (1999) describes, referencing is central to academic writing.

"Reference to previous work is virtually mandatory in academic articles [...] as a strategy for supporting current claims" (Hyland, 1999, p. 362).

Frequently Asked Questions:

What is the purpose of referencing? When do I need a reference? What if I use paraphrasing? Are there other reasons to reference? What about my own ideas? How much referencing do I need? What if I use an author who is mentioned by another author? What if I can't find a reference for the exact point I want to make? How do I do it correctly?

What is the purpose of referencing?

The simplest way to think of referencing is to imagine that your reader might want to find out more about a piece of information, or check the facts for themselves. Your reference shows them  where to look .

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When do I need a reference?

It is important to provide correct references for  any information  which you give in your essay.  Information could include ideas, facts, phrases, or anything else.

This means that you need to  include references for all information , even if it is from something which you do not consider 'academic', such as an unregulated website.  (Technically, it is probably best to avoid these sources of information anyway).

What if I use paraphrasing?

You need to provide a reference  whether or not  you are using the exact words.  Even if you change the words, someone might want to find out more about the information you are referring to.

If you use the same words as the original, you need to use quotation marks around this section, followed by the reference.  If you do not use the same words, you do not need the quotation marks, you only need the reference itself.  Make sure you include a list of references at the end of your essay. See the referencing guidelines for how to do all of this.

Further reading: Beginner's Guide to Paraphrasing

Are there other reasons to reference?

Referencing makes your point  more convincing .  Your reference shows that this information has been published somewhere, and you did not just make it up.  If it is an opinion, your reference shows that other people writing in this area also share your opinion, which makes the opinion  more interesting  for your academic reader.

What about my own ideas?

Sometimes you might want to think of your opinion as unique. It might be a coincidence that someone else thought of the same idea as you. Even if it is a coincidence, and you thought of the opinion by yourself, putting a reference to someone who also thought this way makes your opinion seem  more valid  to the academic community, as it is not simply one person's idea. Sometimes, it might be the case that you are the first person to have thought of an idea.  If that is the case, you need to show how your idea is different from another person's idea.   In all of these situations, you still need references!

Further reading: Beginner's Guide to Avoiding Plagiarism

How much referencing do I need?

It is a good idea to have a reference for every claim you make, if possible. Do not worry about using referencing too often. As a general rule, it is better to use the references too often than not enough. This does not refer to the number of different authors/texts, but the frequency of citing those authors. It should be high-frequency overall.

You may have been given some advice not to use too many references. This advice means you don't need to have a long list of authors that you didn't read properly. Instead, it is better to use fewer texts, but read them in more detail.

You may follow the examples on this site, or you may use a slightly different format. The most important aspect is to be consistent and use the same format for all your references.

What if I use an author who is mentioned by another author?

In this situation, you need to use 'cited in'. It is often useful to describe the secondary quotation a little more, and show how it fits in with the first author. Here is an example. The writer had read Gray et al (2011) but wanted to mention another reference they used.

Example: Secondary citation

To further support their argument , Gray et al (2011:866) summarise a number of other studies which reported positive evaluations of coaching by coachees , including statistics such as "participants estimated return on investment of 5.7 times the initial cost" (McGovern et al, 2001, cited in Gray et al, 2011:866). Studies such as these appear to indicate that coaching can be worthwhile for the individual and the organisation.

Source: Anonymous UCL Institute of Education student (2013)

In this example, only Gray et al (2011) will appear in the reference list at the end of the assignment, as this is the only one that the student has read as a primary source.

What if I can't find a reference for the exact point I want to make?

You can often say that something is similar to an author's point, or connected to an author's point. You can even say that something contradicts an author's point. Using a reference doesn't only mean showing exactly where the information came from. It can also mean showing how information is connected to something that is published. It could also mean showing how an author's statement may be applied in a different context.

Here is an example of something similar to this:

Example: Using a reference to show connections

As some of Bion's (1961) work has shown , groups can be particularly resistant to learning, preferring (if we can speak of a group as having a "preference") to preserve itself. As learning often means movement and change, it can be resisted by a group. Whether or not an 'organisation' can be considered equivalent to a 'group' in this context is outside the scope of this discussion, but insights such as those from Bion's work have been applied very usefully to analyses of the way that organisations may function in particularly conservative ways (see, for example, Armstrong, 2005). It can be useful to remember this when working with various staff members within an organisation.

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How do I do it correctly?

Please refer to the links in the left hand menu for guidance.

Further reading: Reference Effectively and Avoid Plagiarism

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Write it Right - A guide to Harvard referencing style

• Referencing

The Harvard Referencing Style

What is citing, citing page numbers in text - some rules, using direct quotations, how to cite in the body of your text, secondary referencing, using charts, images, figures in the body of your text.

• Paraphrasing
• Reference List & Bibliography
• Elements in References
• Journal articles
• Online journals
• Newspaper articles
• Online newspapers
• Internet sources
• Government and legal publications
• Patents and standards
• Miscellaneous

The Harvard referencing style (also known as ‘author-date’) is commonly used at TUS Midwest. There are two elements to the Harvard referencing style. This means when you reference using the Harvard system, you have to do two things: 

• Include an author-date citation each time you refer to a source in the body of your essay. Note: also, include the page number if it is a direct quotation.
• Compile a complete reference list of all the sources that you cited throughout your essay on a separate page at the end of your essay. Note: this list must be in alphabetical order according to the first author's surname.

In summary, when you are writing up your college projects, you must remember to acknowledge the other authors you are using in two places:

• in the text of your assignment (in-text citations), and,
• at the end of your assignment (reference list).

If you have used the author’s exact words (direct quotation) or the author’s ideas (paraphrasing) from a book, journal article, etc. you must acknowledge this in your text. This is referred to as in-text citing:

In-text citations give the brief (abbreviated) details of the work that you are quoting from, or to which you are referring in your text. These citations will then link to the full reference in the reference list at the end of your work, which is arranged in alphabetical order by author (Pears and Shields, 2019, p.7).

Author prominent citing  This citation method gives prominence to the author’s surname (family name) as part of your sentence with the date and page number in parentheses (round brackets).  Note : The page number is necessary if you are quoting directly. 

Information prominent citing This citation method gives prominence to the information with the required referencing details in parentheses at the end of the citation.

Author(s) name

• For one author, use surname of author only. There is no need to include initials. Example - (Barr, 2016, p. 22)
• For two authors, use both authors’ surnames linked by ‘and’.  Example - (Tabrizi and Rahmani, 2021, p. 13).
• For three or more authors, use the first author’s surname and et al.   Example - (O'Neill  et al ., 2019, p. 120). 
• Give full four digits for the year.

Quotations should be used sparingly, selected carefully, used in context, integrated into your text, and reproduced exactly (including the words, spelling, punctuation, capitalisation and paraphrasing of the original writer).  Short quotations Short quotations (fewer than 30 words) should:

• be incorporated into your sentence without disrupting the flow of your paragraph,
• have single quotation marks,
• have the full stop after the citation, and,
• keep the same font size.

Long quotations   Long quotations (more than 30 words) should:

• be introduced in your own words,
• begin on a new line,
• be fully indented by default (i.e. 1.27 cm) from the left margin,
• be in single line spacing.

Separate the quotation from the lead-in statement with one blank line. The lead-in statement ends with a colon(:). Separate the quotation from the text that follows it with one blank line.

Quotation marks

• Quotation marks are not used for longer quotations.
• When using an information prominent long quotation, the full stop is included after the last sentence of the quotation after the citation.

Words omitted from quotations

• To omit unnecessary words from quotations, use an ellipsis … (3 dots). Note: Make sure the quotation still has the same meaning.
• If the quotation does not begin at the start of a sentence, an ellipsis should be used to convey this.

When you cite someone else’s work, you must state the author/editor and the date of publication. If the work has two authors/editors, you must cite both names. Don't forget to include page numbers for direct quotations.  There is no need to include the title, place of publication etc. These details are listed in the reference list at the end of your essay .  

For a work that has three or more authors/editors, the abbreviation, et al . is used after the first author’s name. 

For a work that has the same author/editor, and was written in the same year as an earlier citation, you must use a lower case letter after the date to differentiate between the two. 

Citing from books with chapters written by different authors  Some books may contain chapters written by several different authors. In this case the author who wrote the chapter should be cited not the editor of the book.

If you are reading a source by one author, for example, Garvey (2019) and he cites or quotes the work of another author, for example, Taylor (1996) you may cite or quote the original work, Taylor (1996) as a secondary reference. Note: It is always best practice to try and locate the original reference and secondary references should only be used if it is difficult to access the original work

Example In-text citation: Taylor’s observations (1996, cited in Garvey, 2019) are based on a genuine respect for nature.  OR  ‘Every living thing has a good of its own’ (Taylor, 1996, quoted in Garvey, 2019, p. 53).

Reference List: Garvey, J. (2019) The ethics of climate change: right and wrong in a warming world . London: Continuum.

Charts, images, figures etc. should be treated as direct quotations in that the author/editor, year and page number should be acknowledged in-text, and the full reference to the item should be listed in the reference list. 

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Home / Guides / Citation Guides / Harvard Referencing

Harvard Referencing Style Guide

What is referencing.

Whenever you write, the writings of others will influence your work. Although it is difficult to gauge all the influences, many of your ideas can be traced back to the resources and materials that you have consulted. These might be books, images , articles, reports, or, of course, the internet. These sources help enrich your writing by giving you ideas to build on. It is important always to give credit to the original thinkers and authors.

Referencing is the method that gives credit to the sources you have used in your work. You should provide references whenever you use a direct quote, paraphrase someone else’s idea, or borrow conceptual words and phrases.

Referencing not only allows credit to be given where credit is due, but it also helps track the various influences on any original piece of writing. If you do not cite the sources of the ideas that you have used in your work, you run the risk of plagiarism. Plagiarism is not only unethical but is also an actual crime in some of its forms. But how do you reference?

Elements of Harvard referencing style

Harvard referencing is a popular method of adding citations to your work. Its appeal lies in the simplicity of the basic system it uses – the author-date structure. Along with this, in Harvard style, you only need to mention the source in two locations: in the in-text reference(s) and in the reference list. Both elements together incorporate all the necessary details about a source in the most efficient way.

So, while reading something, when you come across a citation that looks something like this:

Furley (1999) or (Furley, 1999)

it is an in-text reference that follows the author-date system.

This is an entry in the reference list for the same in-text reference.

Furley, D. (1999) Routledge history of philosophy volume II: from Aristotle to Augustine . 1st edn. London: Routledge.

These Harvard referencing examples provide details about the citation formats for different types of sources.

In-text reference/citation

As is obvious from the name, Harvard in-text citations are references included within the text, that is, inside the sentences that make up its content. These can either be direct statements or quotes, or a paraphrasing of the original work. This type of reference helps in precisely pointing out which portions of the text are borrowed from or influenced by which particular source.

In his work, Furley (1999) wrote about… OR …from Aristotle’s works (Furley, 1999).

As you can see, in-text references provide the author’s surname and the year of publication. The year is provided because sometimes two or more works by the same author are referenced. In this case, the year helps in distinguishing between these works. Note that if you are citing a direct quotation, the in-text citation should also include the page number of that quote, for example (Furley, 1999, p. 2).

However, in-text citations don’t provide other important details about these resources. Rather, they are short enough that you don’t get interrupted while reading the text. Other details are presented in the reference list that you include at the end of your paper.

Reference list

A reference list presents the details of all the resources cited throughout the text in the form of a list at the end of your paper. It includes detailed entries about each of the referenced sources.

Citation structure:

Surname, Initial. (Publication year) Name of the document . Place of publication: Publisher.

Every in-text citation corresponds to an entry in the reference list. So, the reference list entry for the in-text citations discussed above would be:

Einstein, M. (2004) Media diversity: economics, ownership, and the FCC. New Jersey: Routledge.

This entry can also include other details like page numbers, editor’s name, edition, URL, access date, etc., depending upon the type of resource. A reference list allows you to provide all the necessary information without crowding your paper. With this list, you can keep track of how many materials you have consulted and even see if you need to include any more or any other kind of references in your text.

The difference between a bibliography and the Harvard referencing system

Typically, you’ll refer to multiple sources and materials for writing a text, and just using a bibliography can be confusing. You can use the Harvard referencing system to point out the exact location of all your references.

By marking the in-text reference, you can easily locate which idea or quote corresponds to which author. This makes your work easy to read and understand. This way, you and your reader can easily trace the specific portions of the work back to the original texts.

You can also show how much of your text uses source material (whether directly or indirectly) and how much of it is your own ideas and thoughts.

Format for Harvard Referencing

Typically, a paper that uses Harvard referencing has the following format:

• 2.5 cm OR 1-inch margins on all sides
• Recommended fonts: Arial 12 pt or Times New Roman, with double-spacing
• Title is in the center of the page just above the text
• Left-aligned text, with the first sentence of every paragraph indented by 0.5 inch
• Last name is at the top-right corner of the header, followed by page number
• Title page is centre-aligned
• Subheadings are in sentence case and left-aligned

Key takeaways

• Referencing is a way of crediting the various resources consulted while writing a text. Harvard referencing is a system that allows you to include information about the source materials. It is based on the author-date system.
• It includes references: 1) as in-text citations and 2) in a reference list (which is different from a bibliography).
• In-text citations: (Author Surname, Year Published).
• Reference list entry: Author Surname, Initial. (Year Published) Title . Place of Publication: Name of Publisher.

For more help creating citations in Harvard style, try the EasyBib Harvard referencing generator !

Published October 25, 2020.

Harvard Formatting Guide

Harvard Formatting

• et al Usage
• Direct Quotes
• In-text Citations
• Multiple Authors
• Page Numbers
• Writing an Outline
• View Harvard Guide

Reference Examples

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• Referencing

Referencing explained

Why and when to reference.

Referencing is an important part of academic work. It puts your work in context, demonstrates the breadth and depth of your research, and acknowledges other people’s work. You should reference whenever you use someone else’s idea.

View video using Microsoft Stream (link opens in a new window, available for University members only)

These webpages explain what referencing is, why it is important and give an overview of the main elements of how to reference. Our Referencing made simple tutorial opens in a new window and covers how to identify your source and create a reference with interactive examples.

Why reference?

Referencing correctly:

• helps you to avoid plagiarism by making it clear which ideas are your own and which are someone else’s
• shows your understanding of the topic
• gives supporting evidence for your ideas, arguments and opinions
• allows others to identify the sources you have used.

When to reference

Whenever you use an idea from someone else's work, for example from a journal article, textbook or website, you should cite the original author to make it clear where that idea came from. This is the case regardless of whether you have paraphrased, summarised or directly quoted their work. This is a key part of good practice in academic writing.

Read more on:

• academic integrity
• quoting, summarising, paraphrasing, and synthesising
• citing direct quotations in Leeds Harvard or citing direct quotations in Leeds Numeric styles.

University and school policies

The University referencing policy (PDF) sets out the referencing requirements that all taught students and tutors are expected to follow.

Each school in the University requires students to use a specific style of referencing. Check the referencing style used in your school before you begin.

All your citations and references should match the style you are using exactly, including any punctuation, capitalisation, italics and bold, and you should use the same referencing style throughout your assignment.

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Reference Your Essay

Referencing is a system that allows you to acknowledge the contributions and work of others in your writing by citing your sources. A feature of academic writing is that it contains references to the words, information and ideas of others.

All academic essays MUST contain references. Referencing guards against plagiarism , a serious academic offence. Plagiarism is copying someone else's words or ideas and presenting them as your own.

Make sure you are familiar with the referencing style your faculty or school requires. Most have guides specifying the system they prefer. Often Schools/Faculties don't mind which system you use as long as it is consistent . If this is the case, use the system you are most comfortable with.

Reference lists

Remember to list all the books and articles you use for the essay in a Reference List. This is a list of all works cited in your essay and should be the final page.

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Essay and assignment writing guide.

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What you Need to Know about Wuthering Heights

This essay about Heathcliff as a Byronic hero in Emily Brontë’s *Wuthering Heights* explores how the character exemplifies the qualities associated with this literary archetype. Heathcliff’s mysterious origins, dark persona, intense passion, and intelligence define his role within the narrative. His deep and tumultuous love for Catherine Earnshaw and his subsequent drive for revenge against perceived wrongs illustrate key Byronic traits such as a troubled past and a disdain for societal norms. The essay discusses Heathcliff’s complex relationships and strategic manipulations that disrupt the social order, highlighting his emotional depth and vulnerability which evoke both empathy and condemnation from the reader. Through Heathcliff, Brontë engages with Romantic themes of melancholy and the sublime, presenting a character who is both compelling and repellant, ultimately underscoring the enduring appeal of the Byronic hero in literature.

How it works

In Emily Brontë’s Wuthering Heights , the persona of Heathcliff epitomizes the archetype of the Byronic protagonist, a literary persona distinguished by intricacy, shadow, and profundity. Conceived by the Romantic bard Lord Byron, the Byronic protagonist typically manifests characteristics such as a tumultuous history, hubris, profound intellect, a disdain for societal constructs and conventions, profound emotional capacities, and a proclivity toward self-destructive conduct. Heathcliff’s portrayal in Brontë’s novel not only functions as a pivotal catalyst of the storyline but also embarks on a profound exploration into the psychological and emotional facets of such a persona.

The origins of Heathcliff remain enigmatic; he is introduced as a dusky-hued vagabond in appearance, an orphan embraced into the Earnshaw family, thereby laying the groundwork for his outcast status. This enigma surrounding his past is a recurring trait in Byronic protagonists, who frequently possess ambiguous or enigmatic beginnings. His assimilation into the Earnshaw household unravels his intricate associations with the other characters in the narrative, especially Catherine Earnshaw. Heathcliff’s affection for Catherine is profound and overwhelming, yet it is also ruinous, showcasing another characteristic of the Byronic archetype: the capacity for profound but doomed ardor.

Throughout the tale, Heathcliff’s deeds exhibit the quintessential attributes of a Byronic protagonist. His acumen and guile are conspicuous in his manipulation of the Linton and Earnshaw clans to seize control of Wuthering Heights and Thrushcross Grange. Nonetheless, these endeavors are not spurred solely by avarice but by a thirst for retribution against those he perceives have slighted him—another hallmark of the Byronic protagonist’s demeanor, where personal vendettas often propel their motivations. This pursuit of vengeance stems from his mistreatment by Hindley Earnshaw and his perceived betrayal by Catherine, who weds Edgar Linton instead of him, conforming to societal norms rather than personal inclination.

Despite his ostensibly malevolent traits, Heathcliff’s persona evokes sympathy. Brontë adeptly unveils the depths of his anguish, his enduring affection for Catherine, and his susceptibility, which convolute a straightforward denouncement of his actions. This emotional intricacy and internal conflict are central to the Byronic protagonist’s allure; they are flawed, frequently profoundly, but not irrevocably so. Heathcliff’s inner turmoil and external conflicts propel the narrative’s dramatic tension, furnishing a somber counterpoint to the more restrained Victorian character archetypes.

In summation, Heathcliff as a Byronic protagonist in Wuthering Heights furnishes a profound examination in contradictions and intricacies. He disrupts the societal hierarchy and contests the traditions of his era through his intensity and rebellious demeanor. Emily Brontë’s portrayal of Heathcliff addresses the Romantic captivation with sorrow and the majestic, positioning him as a persona that both captivates and repulses. His enduring influence on the literary realm underscores the potency of the Byronic protagonist to provoke contemplation and evoke profound emotional reactions, rendering Heathcliff one of English literature’s most indelible personages.

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As bird flu spreads in cows, here are 4 big questions scientists are trying to answer.

Bird flu is spreading through U.S. dairy cattle. Scientists say the risk to people is minimal, but open questions remain, including how widespread the outbreak is and how the virus is spreading. DOUGLAS MAGNO/AFP via Getty Images hide caption

Bird flu is spreading through U.S. dairy cattle. Scientists say the risk to people is minimal, but open questions remain, including how widespread the outbreak is and how the virus is spreading.

On Friday, Colorado became the latest state to detect the bird flu virus spreading in dairy cattle. It follows revelations earlier in the week that viral fragments are turning up in retail milk.

Still, scientists don't view this as an immediate threat to human health.

Genetic material is not the same as infectious virus and pasteurization is expected to inactivate the virus in milk, but the findings speak to the broader uncertainty about the extent of the spread.

"There's so many critical things that we still need to know to get a better perspective on how bad this is, or maybe it's not so bad," says Dr. Rick Bright, a virologist and the former head of the Biomedical Advanced Research and Development Authority (BARDA).

Federal health agencies started sharing more details publicly this week, but Bright says there's still not enough transparency.

"It's the void that just leaves everyone nervous," he says

Other scientists say the reality is that there are still many unresolved questions about this outbreak, given how novel it is.

"There's a couple big unknowns at this point," says Louise Moncla, a virologist at the University of Pennsylvania School of Veterinary Medicine.

Here's what scientists who are tracking the virus still want to know:

How widespread is the virus in dairy cattle?

That's still far from clear.

While the official tally shows it's been detected in nine states and just over 30 herds, the actual number could be much larger.

First of all, there hasn't been widespread testing in cattle.

The fact that viral material is now being found in retail milk suggests "this virus is probably spread around quite a bit," says Richard Webby , a virologist at St. Jude Children's Research Hospital in Tennessee.

On Thursday, the FDA said that preliminary results from nationwide samples of retail milk indicate about one in five samples are positive for viral traces. A survey of retail milk in the Midwest found 58 out of 150 samples were positive, according to Andrew Bowman at the Ohio State University.

Webby discovered this himself when he went to the store to grab a carton of milk, which he intended to use as a negative control in his work on H5N1.

To his surprise, even that ended up being positive (unfazed, he kept the milk).

Currently the virus has only been detected in a tiny fraction of dairy herds in the U.S., but it's hard to know the significance of that finding when you don't also have details on the overall number of cattle tested, says Dr. Tom Inglesby, director of the Johns Hopkins Centers for Health Security.

" Those are kind of basic questions that would really help get us more ground truth quickly," he says.

The USDA has just taken some new steps that could offer a better picture of the outbreak. There will be mandatory reporting of positive tests in cattle and a requirement that dairy cattle test negative for the virus before they move across state lines.

Potentially complicating the picture: Some unknown number of cattle could be shedding the virus without showing obvious symptoms. Federal health officials have confirmed this.

"We don't know how many animals have this," says Alexis Thompson, a veterinarian at Texas A&M Veterinary Medical Diagnostic Laboratory. "There has been very little sampling done. We don't know how many [sick] animals we have. We don't know how many asymptomatic animals we have. That testing has not been done."

Because milk from sick cows is supposed to be discarded, this could help explain how remnants of the virus entered the milk supply.

If it turns out there are lots of animals shedding the virus and not symptomatic, the outbreak could be "substantially larger" than we realize, says Inglesby. "To get to the bottom of that, we would need to do surveillance testing in places that don't already have clear outbreaks."

Does the milk testing positive on retail shelves contain infectious virus?

So far, it doesn't appear that way, but scientists who are studying this possibility acknowledge it's too soon to say that with absolute certainty.

The PCR testing that has found evidence of viral fragments in the milk on grocery store shelves doesn't actually tell you whether or not it's "live" virus, meaning whether it's capable of replicating.

This form of testing is extraordinarily sensitive and detects small pieces of genetic material, says Lee-Ann Jaykus , a food microbiologist at North Carolina State University.

"There's evidence that that milk at one point in time may have had virus associated with it, but there is no evidence that that virus would be infectious, at least with the information we currently have," she says.

Pasteurizing milk can knock out bacteria and viruses; however, it doesn't erase every trace of those germs.

Federal health officials have stressed that avian influenza doesn't stand up well to the high temperatures and past research on pasteurization indicates "it's very likely to effectively inactivate heat-sensitive viruses like H5N1 in milk from cows."

"We've seen nothing that would change our assessment that the commercial milk supply is safe," said Don Prater from the Food and Drug Administration.

Research on pasteurization in eggs, which happens at a lower temperature than milk, shows that the process inactivates the bird flu virus.

Jaykus and other scientists agree that finding viral material doesn't necessarily suggest an immediate threat to human health.

"It's really important to sort of not get out of control about fear of consuming milk," says Jaykus.

There is an important caveat though: There has been no direct research on how pasteurizing cow milk affects bird flu virus. Those studies are taking place right now.

Early experiments on a small number of samples suggest there is no viable virus in these positive samples, said Jeanne Marrazzo , who directs the National Institute of Allergy and Infectious Diseases.

Webby, who looked at samples of milk sent by Bowman, says they tried to grow the virus in cultured cells and embryonated chicken eggs — two places where flu loves to grow — and found that it did not reproduce.

"It's pretty good evidence," he says, "We could never say there's none, but we could say if it's there, it's at a very, very, very low level."

Jaykus says even if the milk did happen to have a small amount of infectious virus, "there just isn't evidence that that is a transmission route for flu."

Rick Bright, on the other hand, has more concerns about the milk.

"It's a small inconvenience for me not to drink milk until we have more data," he says, "It doesn't mean that I think everyone should stop drinking milk. It's a personal risk assessment."

He says the key question is how much virus is in the milk, and whether that changes if more cows get sick and more virus enters the milk supply.

"The higher the viral load in the milk, the more difficult it is for pasteurization to work completely," he says. "If they show at this point there's no viable virus in the milk, that's a point in time. And what's going to be really critical is that the FDA continues to monitor this."

How exactly is the virus spreading?

For weeks, the leading theory has been that the primary route of spread is through the milk. This is where high concentrations of the virus are being found.

This general idea was affirmed again this week by Mike Watson with the United States Department of Agriculture's Animal and Plant Health Inspection Service, who said the evidence still points to some form of "mechanical transmission."

Virus could be spread on "milking equipment," by "individuals moving from facility to facility," and via rodents that come in contact with milk and then move around, he said.

Federal health officials and scientists believe the virus has moved with lactating cattle from one herd to another. But how it's getting from one cow to another on a given farm "is a key missing piece of knowledge," says Webby.

Genetic sequencing indicates that there was likely a single introduction from birds into cattle, which then resulted in further spread among cattle, says Moncla, who has been analyzing the genomic data.

"A lot of these cattle sequences are quite similar to each other, suggesting that there's almost certainly some degree of cattle-to-cattle transmission going on," she says.

Moncla says it's hard to say exactly how long the virus has been spreading through dairy cattle, although some scientists have suggested it may have been circulating for many months, even earlier than February.

The USDA has also noted another concerning development — that there have been some instances of the virus moving from domesticated poultry to cattle.

"The degree of transmission, combined with the fact that we're likely missing cases in cattle, leads to a bit of concern," says Moncla.

What is the risk to humans as the virus keeps spreading?

First the reassuring news: Even with all these cows being infected, there has only been one documented human infection during the current outbreak in dairy cattle.

That person, a dairy worker in Texas, had conjunctivitis.

This week, federal health officials reiterated that the overall risk to the general public remains low, in part because "we have not observed changes to the virus's genetic makeup that would suggest an enhanced ability to spread to humans or among humans," said Dr. Nirav Shah , principal deputy director at the CDC.

So far, states have tested 23 people for avian flu and have monitored 44 people who were considered exposed and at risk for infection, he said.

Generally, cases of bird flu are rare in humans and it takes a big dose of virus — for example through direct contact while slaughtering poultry — to get infected. Since 2022, there have been 26 human cases of H5N1 virus infection reported worldwide.

Webby says it is possible that cows don't put that much "pressure on the virus to change," which could be one reason scientists haven't seen alarming mutations in the samples collected.

"I don't think the needle has moved at all" in terms of human risk, he says.

Of course, the perennial fear is that the virus could mutate while in cows, or an intermediary animal, and then find its way into humans.

Scientists have documented some mutations in bird flu when it has spread in other mammals. But previous research has shown there needs to be a host of changes — most of all, the virus would have to evolve a way to bind to receptors in the upper airway of humans — to become a pandemic threat.

When it comes to cattle, the CDC's Sonja Olsen says they still aren't sure if it's the exposure to raw milk on the farms that's the primary risk to humans. "We don't know if it's [surface] transmission. We don't know if there's aerosolization of the milk."

Dr. Bright says the CDC should be conducting antibody studies on dairy workers to see if human cases have escaped detection, rather than waiting for cases to show up in the emergency room.

"I am going to keep my radar up," he says. "If this were to get out of hand, we have to be prepared to respond really quickly. And I'm not quite sure we're fully ready to respond if we needed to."