APA (7th ed.) Citation

Gale Group, Littlejohn, S. W., & Foss, K. A. (2009). Encyclopedia of communication theory. Sage.

Chicago Style (17th ed.) Citation

Gale Group, Stephen W. Littlejohn, and Karen A. Foss. Encyclopedia of Communication Theory. Thousand Oaks, California: Sage, 2009.

MLA (9th ed.) Citation

Gale Group, et al. Encyclopedia of Communication Theory. Sage, 2009.