Do I need a citation when I quote or paraphrase an interview?

For a published interview (whether in video, audio, or print form), you should always include a citation, just as you would for any other source.

For an interview you conducted yourself, formally or informally, you often don’t need a citation and can just refer to it in the text or in a footnote, since the reader won’t be able to look them up anyway. MLA, however, still recommends including citations for your own interviews.