APA (7th ed.) Citation

Walters, A. H. (1973). Ecology, food and civilization. C. Knight.

Chicago Style (17th ed.) Citation

Walters, Arthur Harry. Ecology, Food and Civilization. London: C. Knight, 1973.

MLA (9th ed.) Citation

Walters, Arthur Harry. Ecology, Food and Civilization. C. Knight, 1973.