Cita APA

Ridgely, R. S. 1., & Gwynne, J. A. (1976). A guide to the birds of Panama. Princeton, New Jersey: Princeton University Press.

Citación estilo Chicago

Ridgely, Robert Sterling 1946-, y John A. Gwynne. A Guide to the Birds of Panama. Princeton, New Jersey: Princeton University Press, 1976.

Cita MLA

Ridgely, Robert Sterling 1946-, y John A. Gwynne. A Guide to the Birds of Panama. Princeton, New Jersey: Princeton University Press, 1976.