Cita APA (7a ed.)

Barkley, R. A. (1990). Attention-deficit hyperactivity disorder: A handbook for diagnosis and treatment. Guilford.

Cita Chicago Style (17a ed.)

Barkley, Russell A. Attention-deficit Hyperactivity Disorder: A Handbook for Diagnosis and Treatment. New York [etc.]: Guilford, 1990.

Cita MLA (9a ed.)

Barkley, Russell A. Attention-deficit Hyperactivity Disorder: A Handbook for Diagnosis and Treatment. Guilford, 1990.