Corey, G. (1991). Theory and practice of counselling and psychotherapy (4th ed.). Brooks/cole.
Tohutoru Kātū Chicago (17th ed.)Corey, Gerald. Theory and Practice of Counselling and Psychotherapy. 4th ed. California: Brooks/cole, 1991.
Tohutoro MLA (9th ed.)Corey, Gerald. Theory and Practice of Counselling and Psychotherapy. 4th ed. Brooks/cole, 1991.
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