Even though the APA style guide gives clear examples, students still battle with this one.
An interview is not considered recoverable data, so no reference to this is provided in the reference list. You may, however, cite the interview within the text as a personal communication.
- (J. Smith, personal communication, August 15, 2009)
- J. Smith (personal communication, August, 15, 2009)
Source: APA Style Blog (http://www.apastyle.org/learn/faqs/cite-interview.aspx)