APA Citation

Ridgely, R. S., & Tudor, G. (1989). The birds of South America. Oxford: Oxford University.

Chicago Style Citation

Ridgely, Robert S., and Guy Tudor. The Birds of South America. Oxford: Oxford University, 1989.

MLA Citation

Ridgely, Robert S., and Guy Tudor. The Birds of South America. Oxford: Oxford University, 1989.

Warning: These citations may not always be 100% accurate.