Personal communications (conversations, letters, e-mails etc.)
A citation for a personal communication is inserted into your text giving:
(C. Brown, personal communication, June 27, 2018)
or, if the name occurs naturally in your text,
C. Brown (personal communication, June 27, 2018) has suggested that…
A page reference is not required, even when quoting directly.
NB. In APA format, personal communications are NOT included in your reference list/bibliography at the end of your work. This is because they cannot be recovered by a reader of your work.