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References
Stattersfield, A. 1988. A systematic list of the birds presumed to have become extinct since 1600. Páginas 241-244 en Rare birds of the world (Mountfort, G. ed.).
Collar, N. J. y A. T. Juniper. 1992. Dimensions and causes of the parrot conservation crisis. Páginas 1-24 en New World Parrots in crisis (Beissinger, S. R. y N. E. R. Snyder eds.). Smithsonian Institution Press, Washington y Londres.
Mace, G. M. y S. N. Stuart. 1994. Categorías de las listas rojas de la UICN. Borrador de la Versión 2.2.

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