Cita APA (7a ed.)

Simak, C. D. (1968). The werewolf principle. Gollancz.

Cita Chicago Style (17a ed.)

Simak, Clifford D. The Werewolf Principle. London: Gollancz, 1968.

Cita MLA (8a ed.)

Simak, Clifford D. The Werewolf Principle. Gollancz, 1968.