Cita APA

Ridgely, R. S. 1., & Gwynne, J. A. (1989). A guide to the birds of Panama with Costa Rica, Nicaragua, and Honduras (2. edition.). Princeton, New Jersey: Princeton University Press.

Citación estilo Chicago

Ridgely, Robert Sterling 1946-, y John A. Gwynne. A Guide to the Birds of Panama With Costa Rica, Nicaragua, and Honduras. 2. edition. Princeton, New Jersey: Princeton University Press, 1989.

Cita MLA

Ridgely, Robert Sterling 1946-, y John A. Gwynne. A Guide to the Birds of Panama With Costa Rica, Nicaragua, and Honduras. 2. edition. Princeton, New Jersey: Princeton University Press, 1989.