According to Purdue OWL: APA Formatting and Style Guide, no personal communication is included on your reference list. This should be included within the paper and parenthetically cited.

(Person's name, personal communication, date of communication)

Example:

(E. Robbins, personal communication, January 4, 2001).

A.P. Smith claimed that many of her students had difficulties with APA style (personal communication, November 3, 2002).

(This information was obtained from the OWL Purdue Online Writing Lab  To get specific information about how to create other in-text citations, visit their website.)