Literature
- Bertl, J., and F. C. Killebrew. 1983. An osteological comparison of Graptemys caglei Haynes and McKown and Graptemys versa Stejneger (Testudines: Emydidae). Herpetologica 39: 375-382.
- Ernst, C. H., and R. W. Barbour. 1972. Turtles of the United States. Univ. Press Kentucky, Lexington. 347 pp.
- Kizirian, D. A., W. K. King, and J. R. Dixon. 1990. Graptemys versa (Texas map turtle). Size maximum and diet. Herpetol. Rev. 21: 60.
- McKown, R. R. 1972. Phylogenetic relationships within the turtle genera Graptemys and Malaclemys. Ph.D. Diss., Univ. Texas, Austin, Texas.
- Stejneger, L. 1925b. New species and subspecies of American turtles. J. Washington Acad. Sci. 15: 462-463.
- Vogt, R. C. 1981. Graptemys versa. Catalog. Amer. Amphib. Rept. 280: 1-2.