How to cite in a thesis: APA and Harvard with examples
Citations are the most mechanical part of a thesis and the easiest place to lose points. Here is the whole system with examples: in-text citations, the reference list, paraphrase versus quotation, and the mistakes examiners catch.
Pick one style and never mix
Universities most often require APA or Harvard (author-date), some fields use Chicago or numbered styles like IEEE. All of them do the same two jobs: a short pointer in the text and a full record in the reference list. Which style you use is set by your faculty guidelines; the one unforgivable mistake is mixing styles in one thesis.
Examples: book, article, website (APA 7)
A book in the reference list:
- Novak, J. (2021). Consumer behaviour in the digital era. Routledge.
- In-text: (Novak, 2021, p. 45)
A journal article:
- Kovacs, M. (2022). The impact of influencer marketing on Generation Z. Journal of Consumer Marketing, 17(2), 12-24.
- In-text: (Kovacs, 2022)
A website: add the retrieval context and the URL:
- Eurostat. (2024). Population age structure. Retrieved July 5, 2026, from https://ec.europa.eu/eurostat/...
Paraphrase vs. direct quotation
A direct quotation is a verbatim copy in quotation marks with a page number; use it sparingly, for definitions and wording that matters. Everything else should be paraphrased: state the idea in your own words and cite the source, and paraphrasing without plagiarising is a technique in its own right, not a hunt for synonyms.
Reference list rules that get checked
- Every source cited in the text appears in the list and vice versa (examiners and software check the pairing)
- One consistent format: every book identical, every article identical, down to the punctuation
- Alphabetical order for author-date styles, citation order for numbered styles
- Online sources always carry an access date and a working URL
- Secondary citations (Novak, as cited in Kovacs) only when the original is genuinely unavailable
The most common mistakes
- Mixed styles: half the pointers (Novak, 2021), the other half [12]
- Citations added after the writing: page numbers, volumes and editions no longer match
- Wikipedia and blogs as load-bearing sources instead of academic literature
- Missing page numbers on direct quotations
- A hand-built reference list with typos in names and years
How to automate it
The citation apparatus is exactly the kind of work worth delegating to tools: reference managers (Zotero, Mendeley) or a generator that cites as it writes. AIPráce inserts citations while generating the text, uses only verified real sources, and builds the reference list automatically in one consistent format. Your job is then just to review.
FAQ
How many sources should a bachelor thesis have?
A common recommendation is 25 to 40 sources, with a substantial share of academic books and peer-reviewed articles. Check your faculty guidelines for the exact minimum.
Can I cite Wikipedia?
Not as a load-bearing source. Wikipedia is fine for first orientation; cite the sources it references: books, articles, official statistics.
What is the difference between a citation and a reference?
A citation is the short pointer in the text, for example (Novak, 2021, p. 45). A reference is the full record of the source in the reference list at the end. They must match one to one.