Cita APA (7th ed.)
Okun, B. F. (1982). Effective helping: Interviewing and counseling techniques.
Cita Chicago (17th ed.)
Okun, Barbara F. Effective Helping: Interviewing and Counseling Techniques. Monterey, Calif, 1982.
Cita MLA (9th ed.)
Okun, Barbara F. Effective Helping: Interviewing and Counseling Techniques. 1982.
Atenció: Aquestes cites poden no estar 100% correctes.