Citing sources is often described as a straightforward, rule-based practice. But in fact, there are many grey areas around citation, and learning how to apply citation guidelines takes practice and education. If you are confused by it, you are not alone – in fact you might be doing some good thinking.
Here are some guidelines to help you navigate citation practices:
Remember: for every in-text citation, you must also have an accompanying reference entry (and vice-versa)!
There are some exceptions where you typically do not cite:
Some quick facts, such as statistics, are trickier. For example, the number of gun-related deaths per year probably should be cited, because there are a lot of ways this number could be determined (does the number include murder only, or suicides and accidents, as well?) and there might be different numbers provided by different organizations, each with an agenda about gun laws.
The other thing that makes this determination difficult might be that what seems new and insightful to you might be common knowledge to an expert in the field. You have to use your best judgment, and probably err on the side of over-citing, as you are learning to do academic research. You can seek the advice of your instructor, a writing tutor, or a librarian. Knowing what is and is not common knowledge is a practiced skill that gets easier with time and with your own increased knowledge.
Adapted from When to cite, Teaching & Learning, Ohio State University Libraries
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