APA (7th ed.) Citation

Barkley, R. A. (1997). Defiant children: A clinician's manual for assessment and parent training. The Guilford Press.

Chicago Style (17th ed.) Citation

Barkley, Russell A. Defiant Children: A Clinician's Manual for Assessment and Parent Training. New York: The Guilford Press, 1997.

MLA (8th ed.) Citation

Barkley, Russell A. Defiant Children: A Clinician's Manual for Assessment and Parent Training. The Guilford Press, 1997.