Literature
- Hendrickson, John R. 1965. Reptiles of the Galápagos. Pacific Discovery 18(5): 28-36.
- MacFarland, C. G., J. Villa, and B. Toro. 1974a. The Galápagos giant tortoises (Geochelone elephantopus). Part I: Status of the surviving populations. Biol. Conserv. 6: 118-133.
- Pritchard, P. C. H. 1996a. The Galápagos tortoises: nomenclatural and survival status. Chelonian Res. Monogr. (1): 1-85.
- Van Denburgh, J. 1907. Expedition of the California Academy of Sciences to the Galápagos Islands, 1905-1906. I. Preliminary descriptions of four new races of gigantic land tortoises from the Galápagos Islands. Proc. California Acad. Sci. 1: 1-6.