Example 1 – Published or Broadcast Interview
WC: Breslin, Jimmy. Interview by Neal Conan. Talk of the Nation. Natl. Public Radio. WBUR, Boston. 26 Mar. 2002.
Example 2 – Unpublished Interview
WC: Picard, Jean-Luc. Personal interview. 18 Oct. 2352.
Example 3 – Email
WC: Burns, Charles Montgomery. "Re: Uranium enrichment program." Message to the author. 5 Apr. 2014.
NOTE: For sources with no page numbers, such as interviews and emails, it is preferable to include the author's name in the text and omit a parenthetical reference altogether.