Diffusion of innovations.

MLA

Rogers, Everett M. Diffusion of Innovations. 5th ed. New York: The Free Press, 2003.

APA

Rogers, E. M. (2003). Diffusion of innovations. 5th ed. New York: The Free Press.

Chicago

Rogers, Everett M. Diffusion of Innovations. 5th ed. New York: The Free Press, 2003.