Cita APA (7th ed.)

Koestler, A. (1966). The act of creation. Pan Books Ltd..

Cita Chicago (17th ed.)

Koestler, Arthur. The Act of Creation. London, United Kingdom: Pan Books Ltd., 1966.

Cita MLA (9th ed.)

Koestler, Arthur. The Act of Creation. Pan Books Ltd., 1966.