APA (7th ed.) Citation

Koestler, A. (1969). Arrival and departure. Penguin Books.

Chicago Style (17th ed.) Citation

Koestler, Arthur. Arrival and Departure. London, England ; New York, N.Y., USA: Penguin Books, 1969.

MLA (8th ed.) Citation

Koestler, Arthur. Arrival and Departure. Penguin Books, 1969.