↑American Ornithologists' Union (1998) , Check-list of North American Birds, 7th Edition
↑ 5.05.1Lougheed, Stephen C., Joanna R. Freeland, Paul Handford, and Peter T. Boag (2000) A Molecular Phylogeny of Warbling-Finches (Poospiza): Paraphyly in a Neotropical Emberizid Genus, Molecular Phylogenetics and Evolution, vol. 17, no. 3
↑Dickinson, Edward C., ed. (2003) , The Howard and Moore Complete Checklist of the Birds of the World, 3rd edition