| 1 | Allen, E. R. 1938. Notes on Wright's bullfrog, Rana heckscheri (Wright). Copeia 1938:50. |
| 2 | Allen, E. R., and W. T. Neill. 1954. Bullfrogs of Florida. Florida Wildlife 7(10):20–21, 40. |
| 3 | Altig, R. 1972. Notes on the larvae and postmetamorphic tadpoles of four Hyla and three Rana with notes on tadpole color patterns. Journal of the Elisha Mitchell Scientific Society 88:113–119. |
| 4 | Hansen, K. L. 1957. Movements, area of activity, and growth of Rana heckscheri. Copeia 1957:274–277. |