The dissertation written entirely in the wrong style#
A finalist spends the summer writing a 10,000-word dissertation the way her foundation year taught her: author, year, in brackets, the APA way. Two days before the deadline she opens the assessment criteria properly for the first time and finds a single line requiring "Harvard referencing, Cite Them Right conventions." Every in-text citation and the entire reference list need rebuilding from scratch while she is also trying to finish the discussion chapter.
This happens more than universities admit. Referencing gets treated as an afterthought, something to sort out the night before with whatever citation generator is open in another tab. It is mechanical, unglamorous work, which is exactly why it gets skipped until it is expensive.
The three styles a UK student is most likely to meet, APA 7th edition, Harvard, and Vancouver, are not interchangeable. Each encodes different assumptions about how a reader should find and judge a source. This piece compares them directly, shows which disciplines typically expect which, and sets out how to check what your own department wants rather than assuming.
Two families of citation: name-date and numbered#
Every citation does the same job: point a reader to where a claim came from and give credit for someone else's work. How that pointer looks on the page splits into two broad families.
Author-date systems put a surname and year directly in the sentence, in brackets or woven into the text, so a reader can judge how current or authoritative a source is without flipping to the back of the document. APA and Harvard both belong to this family, though they differ in the details below.
Numeric systems replace the name and year with a number, matched to a list or footnote at the point it is first used. This keeps heavily cited writing readable, which matters where a single paragraph might draw on a dozen sources. Vancouver is the standard example, and it is why clinical papers can cite fifty references without every sentence turning into a parenthetical pile-up.
Neither approach is better. A social scientist wants to see who said something and when, because the age of a theory often matters to the argument. A biomedical researcher summarising a body of trial evidence wants the sentence to stay readable, and is happy to send readers to a numbered list for the details.
In-text citations side by side#
In APA 7th edition, a citation reads (Smith, 2020) or, worked into a sentence, Smith (2020) argued that. A direct quotation needs a page number, (Smith, 2020, p. 15). Two authors are joined with an ampersand inside brackets and "and" in running text. Once a source has three or more authors, APA shortens to "Smith et al." from the first citation.
UK Harvard, as taught through the widely used guide Cite Them Right, looks almost identical on the surface: (Smith, 2020). The differences sit in the small print and vary between institutions. Some Harvard guides prefer "and" over an ampersand even inside brackets, and the author count before switching to "et al." is often four rather than three, though universities set their own threshold. This is the detail students most often get wrong when they copy an APA habit into a Harvard essay.
Vancouver drops the author's name from the sentence entirely. A claim is followed by a number, superscript or bracketed, like this claim¹ or this claim (1), reflecting the order sources first appear rather than the alphabet, and the same source keeps its number on reuse. To find out who is actually being cited, the reader checks the numbered list at the end, which gives authors as surname and initials, Smith J rather than J. Smith, usually listing the first six authors before "et al."
Reference lists versus numbered bibliographies#
The back of the document shows the biggest structural difference. An APA reference list is alphabetical by first author's surname, uses a hanging indent, and gives article titles in sentence case, meaning only the first word and proper nouns are capitalised. The journal name is capitalised in title case and italicised, along with the volume number.
Harvard reference lists are also alphabetical, but capitalisation and punctuation vary more between institutions than APA's do, since no single publisher maintains one Harvard manual. Some UK guides use title case for article titles and journal names; others follow APA-style sentence case. This is exactly why checking your department's version matters more for Harvard than for APA.
Vancouver abandons alphabetical order altogether. The reference list runs in citation order, numbered to match, using abbreviated journal titles as indexed by services like PubMed. Article titles are not italicised. A typical entry reads: Smith J, Patel R. Title of the article. J Abbrev. 2020;12(3):45 to 52. Alphabetising a Vancouver list, or leaving a Harvard list in citation order, is one of the most common formatting errors markers see.
Which disciplines actually favour which style#
APA was built for psychology journals, and psychology and much of education and social science in the UK still default to it. Harvard, specifically the Cite Them Right version, is the most common default across humanities, business, and general social science, often set as the university-wide standard outside psychology and the health disciplines. Vancouver is maintained by the International Committee of Medical Journal Editors and is expected across medicine, nursing, dentistry, pharmacy, and most biomedical journals, which is why nearly every UK medical and health school teaches it.
Sciences and engineering are the least consistent group. Some departments use Harvard for essays and lab reports alike, others run a numeric system closer to Vancouver's logic, particularly where a paper cites dozens of technical sources. None of this is a rule. Some psychology modules ask for Harvard, some nursing courses want Harvard for reflective essays and Vancouver only for clinical case reports, and individual module leaders occasionally set their own preference regardless of the faculty default.
How to actually find out what your department wants#
Start with the assessment brief or module handbook. The referencing requirement is almost always stated in the assessment criteria, and a good handbook names the exact edition, APA 7th rather than 6th, or the current edition of Cite Them Right, since guidance shifts between reprints.
Next, check your library's subject guide. Most UK academic libraries publish a referencing guide per faculty, and many provide a ready-made style file for Zotero, EndNote, or Mendeley that matches what markers expect, saving you from checking every punctuation mark by hand.
If the handbook is silent or contradictory, ask your module leader or personal tutor rather than guessing from a different module you took last year. Read a model answer's reference list closely if one is available. Written guides rarely spell out every quirk, and an exemplar often shows the convention more clearly than the rulebook. Never assume the "Harvard" a coursemate uses in a different subject matches your own course's version.
The mistakes that cost marks when switching styles#
Most referencing errors happen when a habit from one style gets carried into another without checking. Mixing a numbered Vancouver system with an alphabetised reference list is a common one, since the two ordering logics cannot combine. Applying the wrong "et al." threshold is another, shortening to "et al." after two authors when the required style expects three or four.
Missing page numbers on direct quotations trips people up too. APA and Harvard both require them for quotes, while Vancouver's numbered entries usually do not. A generic online citation generator left on its default "Harvard" template can silently produce punctuation that does not match Cite Them Right, since there is no single official Harvard standard for it to follow.
Edition mismatches cause quiet damage in dissertations especially. APA 7 changed several rules from APA 6, including how many authors to list before an ellipsis and the running head requirements for student papers. A reference manager left on an old preset keeps producing the older format throughout a document without ever flagging the problem, which is exactly how a finalist ends up rewriting a reference list two days before the deadline.
Common questions students ask about switching styles#
Which edition of APA should I be using?#
APA 7th edition replaced APA 6th in 2019 to 2020 and is now the standard most UK departments mean by "APA." It changed several details, including how many authors appear before an ellipsis. Check the year stated in your handbook, since older lecture slides sometimes still reference APA 6.
Is Harvard one official, fixed style?#
No. Unlike APA and Vancouver, no single body maintains one Harvard manual. UK universities mostly teach it through Cite Them Right, but punctuation and capitalisation vary between institutions. Treat "Harvard" as a family of related conventions, and check your specific department's version.
Can I trust a reference manager to get the style right automatically?#
Mostly, provided you select the correct, current style file rather than a generic default. Managers still struggle with unusual sources such as government reports or datasets, so check the output against your department's guide rather than assuming it is correct.
What happens if I use the wrong style throughout an assignment?#
Markers usually deduct marks under presentation or academic practice criteria rather than failing the piece outright, but the penalty varies by institution and can be significant in a dissertation. Reformatting a whole reference list after the fact is the real cost of not checking early.
Do all science and medicine courses use Vancouver?#
Most clinical, medical, and nursing programmes do, following the ICMJE recommendations used by biomedical journals. Pure sciences and engineering are less consistent: some departments use Harvard, others a numeric system similar in logic but formatted differently.
Is Vancouver the same as a footnote style like OSCOLA or Chicago notes?#
No. Vancouver numbers point to a single numbered list at the end of the document, not a note at the foot of the page. OSCOLA, used in law, and Chicago's notes style place the citation there instead. Both are numeric in spirit, but the mechanics differ enough that experience with one does not transfer directly.
Referencing style will never be the interesting part of an assignment, but it is one of the few things a marker can check in seconds. Confirm the edition, confirm the source, and check it against your own handbook before you write the first citation, not after the last one.
