Published, broadcast, or otherwise retrievable interview:
Use appropriate citation format for the source in which the interview is available.
Interview which you have conducted:
Personal interviews are considered personal communications. Because personal interview content is not considered 'recoverable', these interviews are not added to the list of references. However, they are cited in-text, provided that the interviewee has agreed to be identified.
For example:
(R. Lauren, personal communication, January 12, 2016)
R. Lauren (personal communication, January 12, 2016)
See 'In-text Citations' your paper' tab for more.