APA (7th ed.) Citation

Ridgely, R. S., & Tudor, G. (2009). Field guide to the songbirds of South America: The passerines. University of Texas Press ; In association with the Academy of Natural Sciences of Philadelphia ; World Land Trust-US.

Chicago Style (17th ed.) Citation

Ridgely, Robert S., and Guy Tudor. Field Guide to the Songbirds of South America: The Passerines. Austin : [Philadelphia] : [Washington, D.C.]: University of Texas Press ; In association with the Academy of Natural Sciences of Philadelphia ; World Land Trust-US, 2009.

MLA (9th ed.) Citation

Ridgely, Robert S., and Guy Tudor. Field Guide to the Songbirds of South America: The Passerines. University of Texas Press ; In association with the Academy of Natural Sciences of Philadelphia ; World Land Trust-US, 2009.