The APA manual identifies the following examples of personal communications:
Whilst personal communications should be cited in-text, an entry is not included in the reference list.
To cite in-text include the initials and surname of the author, plus the day month and year of the communication.
|C. Brisden (personal communication, June 4, 2010) commented ...|
|... theories and guidelines were significantly aligned (J.T. Bowen, email, February 25, 2010).