APA (7th ed.) Citation

Snow, B. K., & Snow, D. (1988). Birds and berries: A study of an ecological interaction. Poyser.

Chicago Style (17th ed.) Citation

Snow, Barbara K., and David Snow. Birds and Berries: A Study of an Ecological Interaction. Calton, England: Poyser, 1988.

MLA (9th ed.) Citation

Snow, Barbara K., and David Snow. Birds and Berries: A Study of an Ecological Interaction. Poyser, 1988.