Cita APA (7a ed.)

Yarbro, C. Q. (1981). Time of the fourth horseman. Ace Books.

Cita Chicago Style (17a ed.)

Yarbro, Chelsea Quinn. Time of the Fourth Horseman. New York: Ace Books, 1981.

Cita MLA (9a ed.)

Yarbro, Chelsea Quinn. Time of the Fourth Horseman. Ace Books, 1981.