Referencing trips up more students than almost anything else — and it's pure marks lost for no good reason. The good news: once you understand what each style is for, the rules make sense. Here's the plain-English version of the three you'll meet most.
Two reasons. First, it credits the people whose ideas you've used — failing to do so is plagiarism. Second, it lets your reader trace your sources and check your argument. A consistent, accurate reference list signals a careful scholar.
Used across the social sciences, psychology, education, nursing and business. APA is an author–date style.
Common in UK and Australian universities across many disciplines. Harvard is also author–date and looks very similar to APA — but it isn't a single fixed standard, so your institution's guide is the final word.
The standard in the humanities — English, literature, languages, philosophy. MLA is an author–page style, because in these fields the exact location of a quotation matters more than the year.
Whatever style you use, be consistent. Examiners forgive an unusual edge case; they don't forgive a reference list where every entry is formatted differently.
Use a reference manager (Zotero or Mendeley are free) to keep entries consistent, but always proofread the output — automated tools get details wrong.
Our editors check citations and reference lists for accuracy and consistency in any style — see our proofreading service or get study support.