Kingsbury, Bruce (2005). "Three-toed Box Turtle". The Center for Reptile and Amphibian Conservation and Management. Indiana-Purdue University. Archived from the original on 2011-07-18. Retrieved 2006-06-30.
NatureServe (2 June 2023). "Terrapene carolina triunguis". NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer. Arlington, Virginia: NatureServe. Retrieved 25 June 2023.
web.archive.org
Kingsbury, Bruce (2005). "Three-toed Box Turtle". The Center for Reptile and Amphibian Conservation and Management. Indiana-Purdue University. Archived from the original on 2011-07-18. Retrieved 2006-06-30.