APA (7th ed.) Citation

Barkley, R. A. (1991). Attention-deficit hyperactivity disorder: A clinical workbook. Guilford Press.

Chicago Style (17th ed.) Citation

Barkley, Russell A. Attention-deficit Hyperactivity Disorder: A Clinical Workbook. New York: Guilford Press, 1991.

MLA (9th ed.) Citation

Barkley, Russell A. Attention-deficit Hyperactivity Disorder: A Clinical Workbook. Guilford Press, 1991.