Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Snow, Barbara K., David Snow, i John Busby. Birds and Berries: A Study of an Ecological Interaction. Calton [Scotland]: T & A D Poyser, 1988.

Cita MLA (9th ed.)

Snow, Barbara K., et al. Birds and Berries: A Study of an Ecological Interaction. T & A D Poyser, 1988.