APA (7th ed.) Citation

Hilty, S. L., & Brown, B. (1986). A guide to the birds of Columbia. Princeton University Press.

Chicago Style (17th ed.) Citation

Hilty, Steven L., and Bill Brown. A Guide to the Birds of Columbia. Princeton, N.J.: Princeton University Press, 1986.

MLA (9th ed.) Citation

Hilty, Steven L., and Bill Brown. A Guide to the Birds of Columbia. Princeton University Press, 1986.