APA

Koestler A., . (1946). Darkness at noon. New York: The modern library.

Chicago

Koestler Arthur, . 1946. Darkness at noon. New York: The modern library.

Harvard

Koestler A., . (1946). Darkness at noon. New York: The modern library.

MLA

Koestler Arthur, . Darkness at noon. New York: The modern library. 1946.