Cita APA (7th ed.)

Koestler, A. (1966). Darkness at noon. Penguin.

Cita Chicago (17th ed.)

Koestler, Arthur. Darkness at Noon. Harmondsworth Middlesex: Penguin, 1966.

Cita MLA (9th ed.)

Koestler, Arthur. Darkness at Noon. Penguin, 1966.