↑Stebbins,R.C. (1985) A Field Guide to Western Reptiles and Amphibians, 2nd ed., Houghton Mifflin, Boston
↑Stejneger, L. (1890) Results of a biological survey of the San Francisco Mountain region and Desert of the Little Colorado, Arizona. Part V. Annotated list of reptiles and batrachians collected by Dr. C. Hart Merriam and Vernon Bailey on the San Francisco Mountain Plateau and, North American Fauna, No. 3: 103-118
↑ 4.04.1Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. (ed.) (2011). "Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist". Species 2000: Reading, UK. Ginkuhà 24 Septyembre 2012.CS1 maint: multiple names: authors list (link) CS1 maint: extra text: authors list (link)