Collar, N. J (1997): Family Psittacidae (Parrots) — In del Hoyo, J., Elliot, A. and Sargatal, J (eds.) Handbook of the Birds of the World. 4. Sandgrouse to Cuckoos: 280-477: Lynx Edicions, Barcelona. [pour Psittacus intermedia et Trichoglossus haematodus]
Collar, N. J. 1997. Family Psittacidae (Parrots). En del Hoyo, J., Elliot, A. y Sargatal, J. eds. Handbook of the Birds of the World. 4. Sandgrouse to Cuckoos: 280-477: Lynx Edicions, Barcelona (para Psittacus intermedia y Trichoglossus haematodus).