APA (7th ed.) Citation

Hediger, H. (1955). Studies of the psychology and behaviour of captive animals in zoos and circuses. Criterion Books.

Chicago Style (17th ed.) Citation

Hediger, Heini. Studies of the Psychology and Behaviour of Captive Animals in Zoos and Circuses. New York: Criterion Books, 1955.

MLA (9th ed.) Citation

Hediger, Heini. Studies of the Psychology and Behaviour of Captive Animals in Zoos and Circuses. Criterion Books, 1955.