Not every proposition in a law review article requires citation, nor does every footnote require cited authority. Indeed, only a few of the several possible types of footnotes require the author to cite to authority. Unfortunately, many student editors and research assistants do not understand the distinctions among types of footnotes and expect each to look the same – a reference to some other author's research or thoughts on the subject mentioned in the text. I have therefore written this article explaining the different types of footnotes and how to prepare them.