↑ Stejneger, L., and T. Barbour. 1917. A Check List of North American Amphibians and Reptiles. Harvard University Press. Cambridge, Massachusetts. 125 pp. (Carphophis vermis, p. 74.)
↑ Conant, R., and W. Bridges. 1939. What Snake Is That? A Field Guide to the Snakes of the United States East of the Rocky Mountains. (with 108 drawings by E. Malnate) D. Appleton-Century. New York and London. Frontispiece map + viii + 163 pp. + Plates A-C, 1-32. (Carphophis amoena vermis, p. 32 + Plate 2, Figure 5.)
↑ Wright, A.H., and A.A. Wright. 1957. Handbook of Snakes of the United States and Canada. Comstock. Ithaca and London. 1,105 pp. (in two volumes) (Carphophis amoenus vermis, pp. 110-112, Figure 35 + Map 12 on p. 105.)
