Hackney, H., & Cormier, L. S. (2009). The professional counselor: A process guide to helping (6th ed.). Pearson.
Citace podle Chicago (17th ed.)Hackney, Harold, a L. Sherilyn Cormier. The Professional Counselor: A Process Guide to Helping. 6th ed. Upper Saddle River, N.J: Pearson, 2009.
Citace podle MLA (9th ed.)Hackney, Harold, a L. Sherilyn Cormier. The Professional Counselor: A Process Guide to Helping. 6th ed. Pearson, 2009.
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