APA (7th ed.) Citation

Guilford Publications, Inc, Barkley, R. A., & Dawkins, K. (2006). Understanding the defiant child. Guilford Publications.

Chicago Style (17th ed.) Citation

Guilford Publications, Inc, Russell A. Barkley, and Kevin Dawkins. Understanding the Defiant Child. New York: Guilford Publications, 2006.

MLA (9th ed.) Citation

Guilford Publications, Inc, et al. Understanding the Defiant Child. Guilford Publications, 2006.