Steve N. G. Howell, Sophie Webb: A guide to the birds of Mexico and northern Central America, s. 538. Oxford University Press, 1995. ISBN 978-0198540120Kirja Googlen teoshaussa Viitattu 13.1.2011. (englanniksi)
iucnredlist.org
BirdLife International: Cyanocorax collieiIUCN Red List of Threatened Species. Version 2013.2. 2012. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 4.3.2014. (englanniksi)