APA (7th ed.) Citation

Koestler, A. (1959). The sleepwalkers: A history of man's changing vision of the universe. Grosset & Dunlap.

Chicago Style (17th ed.) Citation

Koestler, Arthur. The Sleepwalkers: A History of Man's Changing Vision of the Universe. New York: Grosset & Dunlap, 1959.

MLA (9th ed.) Citation

Koestler, Arthur. The Sleepwalkers: A History of Man's Changing Vision of the Universe. Grosset & Dunlap, 1959.

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