APA-referens (7:e uppl.)

Graham, B. (1986). Angels: God's secret agents (Rev. and expanded ed.). Word Books.

Chicago-referens (17:e uppl.)

Graham, Billy. Angels: God's Secret Agents. Rev. and expanded ed. Waco, Tex: Word Books, 1986.

MLA-referens (9:e uppl.)

Graham, Billy. Angels: God's Secret Agents. Rev. and expanded ed. Word Books, 1986.