APA (7th ed.) Citation

Snyder, N. F. R., Enkerlin-Hoeflich, E. C., & Cruz-Nieto, M. A. (1999). Thick-billed parrot: Rhynchopsitta pachyrhyncha. Birds of North America, Inc..

Chicago Style (17th ed.) Citation

Snyder, Noel F. R., Ernesto C. Enkerlin-Hoeflich, and M. A. Cruz-Nieto. Thick-billed Parrot: Rhynchopsitta Pachyrhyncha. Philadelphia: Birds of North America, Inc., 1999.

MLA (9th ed.) Citation

Snyder, Noel F. R., et al. Thick-billed Parrot: Rhynchopsitta Pachyrhyncha. Birds of North America, Inc., 1999.