APA-referens (7:e uppl.)

Horn, S. H. (1957). The spade confirms the book. Review and Herald.

Chicago-referens (17:e uppl.)

Horn, Siegfried H. The Spade Confirms the Book. Washington, D.c: Review and Herald, 1957.

MLA-referens (9:e uppl.)

Horn, Siegfried H. The Spade Confirms the Book. Review and Herald, 1957.