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). New York and London: D. Appleton-Century. 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. Ithaca and London: Comstock Publishing Associates, A Division of Cornell University Press. 1,105 pp. (in two volumes) (Carphophis amoenus vermis, pp. 110-112, Figure 35 + Map 12 on p. 105).
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. (Carphophis amoenus vermis, pp. 162-163).
