Amazona viridigenalis

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Enkerlin-Hoeflich, E. C. 1995. Comparative ecology and reproductive biology of three species of Amazona parrots in northeastern Mexico. dissertation. Ph.D., Texas A&M University, USA.

Enkerlin-Hoeflich, E. C.; Hogan, K. M. 1997. Red-crowned Parrot (Amazona viridigenalis). In: Poole, A.; Gill, F. (ed.), The birds of North America, No. 292, pp. 1-20. The Academy of Natural Sciences, and The American Ornithologists' Union, Philadelphia and Washington, DC.

Howell, S. N. G.; Webb, S. 1995. A guide to the birds of Mexico and northern Central America. Oxford University Press, Oxford.

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Snyder, N.; McGowan, P.; Gilardi, J.; Grajal, A. 2000. Parrots: status survey and conservation action plan 2000-2004. International Union for Conservation of Nature and Natural Resources, Gland, Switzerland and Cambridge, UK.

Wege, D. C.; Long, A. J. 1995. Key Areas for threatened birds in the Neotropics. BirdLife International, Cambridge, U.K.