Coba jelasin Galeri dari Betet-kelapa filipina dong

Dickinson, E.C., R.S. Kennedy and K.C. Parkes (1991). The birds of the Philippines: An annotated check-list. British Ornithologists' Union Check-list No. 12.

Juniper, T. and M. Parr (1998). Parrots: A Guide to Parrots of the World. Yale University Press, New Haven and London; ISBN 0-300-07453-0.

Kennedy, R.S., P.C. Gonzales, E.C. Dickinson, H.C. Miranda, Jr., and T.H. Fisher (2000). A Guide to the Birds of the Philippines. Oxford University Press, Oxford and New York; ISBN 0-19-854668-8.