Margaret E. answered 03/18/19
Experienced English/Writing Tutor
It depends on the specific style manual/guide that you are following. There are some common styles that lots of places use, such as Chicago, APA, MLA, and AP. Each field tends to have a specific style that is common or required in it. Check the manual for the specific style that you're using. Some styles use in-text citations and some use footnotes, and where the footnote is placed should also be marked in the guide.