Walker, J. R., & Taylor, T. W. (2006). The Columbia guide to online style (2nd ed.). Columbia University Press.

Walker, Janice R., and Todd W. Taylor. The Columbia Guide to Online Style. 2nd ed. New York: Columbia University Press, 2006.

Walker, Janice R., and Todd W. Taylor. The Columbia Guide to Online Style. 2nd ed. Columbia University Press, 2006.