↑Ottley, John R.; Solis, Victor M. Velazques (1989) An Extant, Indigenous Tortoise Population in Baja California Sur, Mexico, with the Description of a New Xerobates (Chelonii: Testudinidae)., The Great Basin Naturalist 49 (4): 496
↑ 3.03.1Cooper (1863) , Proc. California Acad. Vol. 2, p. 120
↑ 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)