Below are examples of how to cite a personal communication in common citation styles.If you do not have the living book's name, you can use the living book's title as a replacement.
(J. Smith, personal communication, August 15, 2009)
“Because they do not provide recoverable data, personal communications are not included in the reference list. Cite personal communication in text only. Give the initials as well as the surname of the communicator, and provide as exact date as possible.”
Sec. 6.20, APA Manual
Use a signal phrase or the interviewees name e.g. (Smith) OR "In an interview with Smith..."
Include your name as the interviewer. Smith, Susan. Interview. By Laksamee Putnam. 22 Oct. 2002.
(Jennifer Galbraith, Interview)
“Reference list entries are unneeded, though each person cited must be fully identified elsewhere in the text."
1. Bill Smith, interview by author, Putnam, LA, February 18, 2016.
Cite an unpublished interview only in notes.
(2016 conversation between M Jackson and me; unreferenced)
“CSE recommends placing references to personal communications such as letters, conversations, lectures, and presentations within the running text, not as formal references.”
Sec. 126.96.36.199.3, CSE manual
Jordan, M. T. University Union, Towson University, Towson, MD. Personal communication, 2015.
P. 316, ACS Style Guide