Cita APA (7a ed.)

Powell, D. J. (1980). Clinical supervision. Clinical supervision skills for substance abuse counselors.

Cita Chicago Style (17a ed.)

Powell, David J. "Clinical Supervision." Clinical Supervision Skills for Substance Abuse Counselors 1980.

Cita MLA (9a ed.)

Powell, David J. "Clinical Supervision." Clinical Supervision Skills for Substance Abuse Counselors, 1980.