Q. How do I cite and reference someone I interviewed?
If the speech is from an interview you conducted, you can cite it as personal communication.
For personal communication, you only need an in-text citation (no reference list entry is needed).
(Initial. Last name, personal communication, Month, day, year).
(J. McGill, personal communication, October 12, 2017).
If you read or listened to the interview/presentation in a print or an electronically published source (podcast, video, etc.) you need to cite it in-text and list it on your reference page.