APA (7th ed.) Citation

Hediger, H. (1968). The psychology and behaviour of animals in zoos and circuses. Dover Publications.

Chicago Style (17th ed.) Citation

Hediger, Heini. The Psychology and Behaviour of Animals in Zoos and Circuses. New York: Dover Publications, 1968.

MLA (9th ed.) Citation

Hediger, Heini. The Psychology and Behaviour of Animals in Zoos and Circuses. Dover Publications, 1968.