Cita APA

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

Citación estilo Chicago

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

Cita MLA

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