Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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