Style de citation APA (7e éd.)

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

Style de citation Chicago (17e éd.)

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

Style de citation MLA (9e éd.)

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