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)
(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).
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