APA (7th ed.) Citation

Koestler, A. (1941). Scum of the earth. Macmillan.

Chicago Style (17th ed.) Citation

Koestler, Arthur. Scum of the Earth. New York: Macmillan, 1941.

MLA (9th ed.) Citation

Koestler, Arthur. Scum of the Earth. Macmillan, 1941.

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