APA (7th ed.) Citation

Koestler, A. (1940). Darkness at noon. Jonathan Cape.

Chicago Style (17th ed.) Citation

Koestler, Arthur. Darkness at Noon. London: Jonathan Cape, 1940.

MLA (9th ed.) Citation

Koestler, Arthur. Darkness at Noon. Jonathan Cape, 1940.

Warning: These citations may not always be 100% accurate.