APA (7th ed.) Citation

Ridgely, R. S., & Gwynne, J. A. (1981). A guide to the birds of Panama (3rd printing, with corrections and additions.). Princeton University Press.

Chicago Style (17th ed.) Citation

Ridgely, Robert S., and John A. Gwynne. A Guide to the Birds of Panama. 3rd printing, with corrections and additions. Princeton, N.J.: Princeton University Press, 1981.

MLA (9th ed.) Citation

Ridgely, Robert S., and John A. Gwynne. A Guide to the Birds of Panama. 3rd printing, with corrections and additions. Princeton University Press, 1981.