Cita APA

Stiles, F. G., Skutch, A. F., & Gardner, D. (1989). A guide to the birds of Costa Rica. New York: Cornell University Press.

Citación estilo Chicago

Stiles, F. Gary, Alexander Frank Skutch, y Dana Gardner. A Guide to the Birds of Costa Rica. New York: Cornell University Press, 1989.

Cita MLA

Stiles, F. Gary, Alexander Frank Skutch, y Dana Gardner. A Guide to the Birds of Costa Rica. New York: Cornell University Press, 1989.