In: del Hoyo, Josep; Elliott, Andrew & Sargatal, Jordi (editors): Handbook of Birds of the World, Volume 2: New World Vultures to Guineafowl: 194-195, plate 20.
"In:" del Hoyo, Josep; Elliott, Andrew & Sargatal, Jordi (editors): "Handbook of Birds of the World, Volume 2: New World Vultures to Guineafowl": 194-195, plate 20.