Transcription of an audio or video file (podcast, interview, speech, etc.)
BBC Cassettes. (1980). 1971 BBC radio interview with J. R. R. Tolkien (D. Gerrolt, Interviewer) [Interview transcript]. Retrieved from http://www.tolkienlibrary.com/press/894-Tolkien_1971_BBC_Interview.php
National Public Radio (Producer). (2011, April 22). Science diction: The origin of the word 'robot' [Podcast transcript]. Retrieved from http://www.npr.org/2011/04/22/135634400/science-diction-the-origin-of-the-word-robot
If the title does not make it clear to the reader what is being cited, provide a description of the form in brackets.
Provide the exact date when available since radio interviews and podcasts can occur frequently.
in the text, use (BBC, 1980) and (National Public Radio, 2011).