Jobling, J. A. (2016). Key to Scientific Names in Ornithology. Ur del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2016). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. Hämtad från www.hbw.com.
McGraw, K. (10 juni 2005). ”"The physiological costs of being colourful: nutritional control of carotenoid utilization in the American goldfinch, Carduelis tristis"”. Animal Behaviour "69" (3): ss. 653-660., refererad i American Goldfinch i engelskspråkiga Wikipedia, hämtad 2007-08-18
