As readers are unable to access personal communications the author may include, personal communications are not listed on the reference list. Thus, they are only listed in in-text citations. Cite the name of the person communicated with, as well as an approximate date.
Email communication:
Parenthetical Citation: (A. Jones, personal communication, 2020)
Narrative Citation: According to A. Jones (personal communication, 2020)
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Interview:
Parenthetical Citation: (Windholz, personal communication, 2020)
Narrative Citation: Windholz (personal communication, 2020)