Referencing is one of the most commonly misunderstood aspects of academic writing. Many students know they need to cite sources, but fewer understand the nuances between different referencing styles — or why choosing the right one matters. This guide breaks down the three most common styles used in UK and US universities: Harvard, APA, and OSCOLA.
Why Referencing Matters
Accurate referencing serves three critical purposes. First, it gives credit to the original authors whose ideas and research you are drawing on. Second, it allows your reader to locate and verify your sources. Third, it demonstrates the breadth and credibility of your research — something markers actively look for at university level.
Incorrect or inconsistent referencing can result in accusations of plagiarism, even when unintentional, and can significantly reduce your grade.
Quick Comparison
| Style | Used In | In-Text Format | Common In |
|---|---|---|---|
| Harvard | UK universities | (Author, Year) | Humanities, Social Sciences, Business |
| APA 7th | US & international | (Author, Year) | Psychology, Education, Sciences |
| OSCOLA | UK Law schools | Footnotes | Law, Legal Studies |
| MLA | US universities | (Author Page) | Literature, Languages, Arts |
| Vancouver | Medical schools | Numbers [1] | Medicine, Nursing, Healthcare |
Harvard Referencing
Harvard is the most widely used referencing style at UK universities. It uses an author-date system where citations appear within the text in brackets, and a full reference list is provided at the end of the document.
In-Text Citation
Reference List Entry (Book)
💡 Note: Harvard does not have one single official version — different universities use slightly different variants. Always check your institution's specific Harvard guide.
APA 7th Edition
The American Psychological Association (APA) style is the standard in the United States, particularly in the social and behavioural sciences. The 7th edition, published in 2020, introduced several updates including changes to how websites, social media, and journal articles are cited.
In-Text Citation
Reference List Entry (Book)
Key differences from Harvard include APA's use of sentence case for titles, the inclusion of a DOI for journal articles, and specific formatting for group authors.
OSCOLA
The Oxford University Standard for Citation of Legal Authorities (OSCOLA) is used almost exclusively in UK law schools. Unlike Harvard and APA, OSCOLA uses footnotes rather than in-text brackets, and does not use a bibliography in the traditional sense.
Footnote Citation (Case)
Footnote Citation (Journal Article)
💡 Note: In OSCOLA, the first citation of a source uses the full reference. Subsequent citations use a shortened form, such as the case name or author surname.
Which Style Should You Use?
The answer is simple — use whichever style your module handbook or assignment brief specifies. If your institution does not specify one, use the style most common in your discipline:
- Business, Social Sciences, Humanities (UK): Harvard
- Psychology, Education, Sciences (US/International): APA 7th
- Law (UK): OSCOLA
- Literature and Languages (US): MLA
- Medicine and Nursing: Vancouver
Common Referencing Mistakes to Avoid
- Mixing referencing styles within a single document
- Missing page numbers for direct quotations
- Forgetting to include all in-text citations in the reference list
- Incorrect capitalisation in titles
- Not including DOIs for online journal articles
Mastering referencing takes time and practice, but getting it right makes a real difference to your final grade. If you are unsure about your referencing or need a professional to check your work, our editing and proofreading service ensures everything is accurate before you submit.
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