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.
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.