Cita APA (7a ed.)

Ridgely, R. (1976). A Guide to the Birds of Panama. Princeton University Press.

Cita Chicago Style (17a ed.)

Ridgely, Robert. A Guide to the Birds of Panama. New Jersey - USA: Princeton University Press, 1976.

Cita MLA (8a ed.)

Ridgely, Robert. A Guide to the Birds of Panama. Princeton University Press, 1976.