APA (7th ed.) Citation

Knapp, M. L., Hall, J. A., & Horgan, T. G. (2014). Nonverbal communication in human interaction (Eight edition.). Cengage learning.

Chicago Style (17th ed.) Citation

Knapp, Mark L., Judith A. Hall, and Terrence G. Horgan. Nonverbal Communication in Human Interaction. Eight edition. Boston, Mass: Cengage learning, 2014.

MLA (9th ed.) Citation

Knapp, Mark L., et al. Nonverbal Communication in Human Interaction. Eight edition. Cengage learning, 2014.