Cita APA (7a ed.)

Koestler, A., & Hardy, D. (1953). Darkness at Noon (6th ed.). The New American library.

Cita Chicago Style (17a ed.)

Koestler, Arthur, y Daphne Hardy. Darkness at Noon. 6th ed. New York: The New American library, 1953.

Cita MLA (9a ed.)

Koestler, Arthur, y Daphne Hardy. Darkness at Noon. 6th ed. The New American library, 1953.