(2002). Effective helping: Interviewing and counseling techniques / Barbara F. Okun.
Tohutoru Kātū Chicago (17th ed.)Effective Helping: Interviewing and Counseling Techniques / Barbara F. Okun. 2002.
Tohutoro MLA (9th ed.)Effective Helping: Interviewing and Counseling Techniques / Barbara F. Okun. 2002.
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