Name of person interviewed. Description. Date.
Johnson, Frank. Personal Interview. 20 Sep. 2019.
Potter, Melinda. FaceTime Interview. 20 Sep. 2019.
Name of person who sent the letter. Description. Date.
Garner, Susan. Letter to the Author. 8 Feb. 2020.
In text citation (sample wording): Frank Johnson holds the view that ... ; in her letter, Garner points out that ...
Name of person who sent the email. "Subject Line." Date.
Bircher, Alexander D. "Re: Benefits of Fasting." 8 Feb. 2020.
In text citation: ... (Bircher)