If the information you are referencing was obtained by personal communication, i.e. telephone call, or a personal interview you need to document it in the text, however you are not required to add it to the reference list at the end. You may also add the abbreviation pers.comm to the reference.
When interviewed on 8 June 2015, Ms. McIntee confirmed….
(Mr. D. Thomas, 2013, pers. comm., 8 June)