Cita APA (7th ed.)

Okun, B. F. (2002). Effective helping: Interviewing and counseling techniques (6th ed.). Brooks/Cole.

Cita Chicago (17th ed.)

Okun, Barbara F. Effective Helping: Interviewing and Counseling Techniques. 6th ed. Pacific Grove, Calif: Brooks/Cole, 2002.

Cita MLA (9th ed.)

Okun, Barbara F. Effective Helping: Interviewing and Counseling Techniques. 6th ed. Brooks/Cole, 2002.