Scum of the earth

MLA

Koestler, Arthur. Scum of the Earth. New York: The Macmillan Company, 1948.

APA

Koestler, A. (1948). Scum of the earth. New York: The Macmillan Company.

Chicago

Koestler, Arthur, Scum of the Earth. New York: The Macmillan Company, 1948.