Create a bibliographic entry for the personal testimony reference. If the reference is an interview list the last name of the person interviewed, followed by a comma and their first name. List the type of interview you conducted. For example, the interview could have been a "personal interview" or "e-mail interview". Finally, list the date of the personal interview. For example:
Day, John. Personal interview. 29 December, 2009.
Create a bibliographic entry for a reference using personal testimony such as a text or a telephone conversation similarly to the entry in Step 1. Always begin with the name of the person whose testimony you are using, last name first. Follow with the type of source, in this case it could be a text message, followed by the date. For example:
Ryley, Sarah. Text message. April 20, 2008.
Use the individual's last name in a parenthetical in-text citation. When using the personal testimony within the text of a paper or written document place the last name of the source in parenthesis at the end of the sentence which uses the source. For example:
"Witnesses claimed that the courtroom was quiet on Friday (Ryley)."