APA-referens (7:e uppl.)

Friendly, F. W. (1967). Due to circumstances beyond our control. Randon House.

Chicago-referens (17:e uppl.)

Friendly, Fred W. Due to Circumstances Beyond Our Control. New York: Randon House, 1967.

MLA-referens (9:e uppl.)

Friendly, Fred W. Due to Circumstances Beyond Our Control. Randon House, 1967.