Enck, J. J., Forter, E. T., & Whitley, A. (1960). The comic in theory and practice. Appleton-Century-Crofts.

Enck, John Jacob, Elizabeth T. Forter, and Alvin Whitley. The Comic in Theory and Practice. New York: Appleton-Century-Crofts, 1960.

Enck, John Jacob, et al. The Comic in Theory and Practice. Appleton-Century-Crofts, 1960.