Frost, Darrel R. (2015). "Anaxyrus americanus (Holbrook, 1836)". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. [1] Alirita la 17an de Marto 2017.
amphibiatree.org
Review: The Amphibian Tree of Life, de Frost, D.R. et al., Amphibiatree [2]Arkivigite je 2013-04-04 per la retarkivo Wayback Machine Alirita la 17an de Marto 2017.
amphibiaweb.org
"Bufonidae". AmphibiaWeb: Information on amphibian biology and conservation. [web application]. Berkeley, California: AmphibiaWeb. 2015. [3] Alirita la 17an de Marto 2017.
web.archive.org
Review: The Amphibian Tree of Life, de Frost, D.R. et al., Amphibiatree [2]Arkivigite je 2013-04-04 per la retarkivo Wayback Machine Alirita la 17an de Marto 2017.
