Vasile, Ronald S. (Autumn 1994). "The Early Career of Robert Kennicott, Illinois' Pioneering Naturalist". Illinois Historical Journal. 87 (3): 165. JSTOR40192718.
Wright, A.H., and A.A. Wright (1957). Handbook of Snakes of the United States and Canada. Ithaca and London: Comstock. 1,105 pp. (in 2 volumes) (Natrix kirtlandi, pp. 496–499, Figure 146 + Map 40 on p. 491).
Smith, H.M., and E.D. Brodie Jr. (1982). Reptiles of North America: A Guide to Field Identification. New York: Golden Press. 240 pp. ISBN0-307-13666-3. (Clonophis kirtlandi, pp. 156–157).