Cita APA

Cummings, N. A., & Cummings, J. L. (2000). The first session with substance abusers: A step-by-step guide. San Francisco: Jossey-Bass.

Chicago Style Citation

Cummings, Nicholas A., i Janet L. Cummings. The First Session With Substance Abusers: A Step-by-step Guide. San Francisco: Jossey-Bass, 2000.

Cita MLA

Cummings, Nicholas A., i Janet L. Cummings. The First Session With Substance Abusers: A Step-by-step Guide. San Francisco: Jossey-Bass, 2000.