APA aipamena

Koestler, A., & Hardy, D. (1994). Darkness at noon. Vintage.

Chicago Style aipamena

Koestler, Arthur, and Daphne Hardy. Darkness at Noon. London: Vintage, 1994.

MLA aipamena

Koestler, Arthur, and Daphne Hardy. Darkness at Noon. Vintage, 1994.