Where to look for references:
Books: At the end of chapters, in footnotes, or at the end of the book.
Articles: At the end of the article, or mentioned within the article
Websites: At the end of the webpage, or mentioned within the webpage.
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In addition to looking for a list of references, look at the references themselves:
- are the references scholarly sources?
- are the references up-to-date? (does that matter for your topic?)