Cita APA (7th ed.)

Keene, C., & Frame, P. (1982). The sinister omen. Wanderer Books.

Cita Chicago (17th ed.)

Keene, Carolyn, i Paul Frame. The Sinister Omen. New York: Wanderer Books, 1982.

Cita MLA (9th ed.)

Keene, Carolyn, i Paul Frame. The Sinister Omen. Wanderer Books, 1982.