APA (7th ed.) Citation

Bailey, A. M., & Niedrach, R. J. (1965). Birds of Colorado. Denver Museum of Natural History.

Chicago Style (17th ed.) Citation

Bailey, Alfred M., and Robert J. Niedrach. Birds of Colorado. [Denver]: Denver Museum of Natural History, 1965.

MLA (9th ed.) Citation

Bailey, Alfred M., and Robert J. Niedrach. Birds of Colorado. Denver Museum of Natural History, 1965.