APA (7th ed.) Citation

Hilty, S. L., & Brown, W. L. (1986). A guide to the birds of Colombia. Princeton Univ. Press.

Chicago Style (17th ed.) Citation

Hilty, Steven L., and William L. Brown. A Guide to the Birds of Colombia. Princeton, NJ [u.a.]: Princeton Univ. Press, 1986.

MLA (9th ed.) Citation

Hilty, Steven L., and William L. Brown. A Guide to the Birds of Colombia. Princeton Univ. Press, 1986.