Cita APA (7th ed.)

Strieber,Whitley. (1992). Unholy fire. Penguin books U.S.A Inc..

Cita Chicago (17th ed.)

Strieber,Whitley. Unholy Fire. New York: Penguin books U.S.A Inc., 1992.

Cita MLA (9th ed.)

Strieber,Whitley. Unholy Fire. Penguin books U.S.A Inc., 1992.