Cita APA (7a ed.)

Gerrold, D., & Niven, L. (1971). The flying sorcerers. Ballantine Books.

Cita Chicago Style (17a ed.)

Gerrold, David, y Larry Niven. The Flying Sorcerers. New York: Ballantine Books, 1971.

Cita MLA (9a ed.)

Gerrold, David, y Larry Niven. The Flying Sorcerers. Ballantine Books, 1971.