Personal Communication
As personal communication is not recoverable or archived, it is not included in a reference list, but is acknowledged in-text. Include private letters, tutor comments, own class notes, interviews, telephone conversations, social media, etc. Use the initials and surname of the person and as exact a date as possible.
Example—in-text citation
K. W. Wiremu (personal communication, January 18, 2010) commented that...
or
....(K.W. Wiremu, personal communication, January 18, 2010).