APA (7th ed.) Citation

Hediger, H. (1950). Wild animals in captivity ([1st English ed.].). Butterworths Scientific Publications.

Chicago Style (17th ed.) Citation

Hediger, Heini. Wild Animals in Captivity. [1st English ed.]. London: Butterworths Scientific Publications, 1950.

MLA (9th ed.) Citation

Hediger, Heini. Wild Animals in Captivity. [1st English ed.]. Butterworths Scientific Publications, 1950.