APA (7th ed.) Zitazioa
Corey, G. (1990). Theory and practice of counselling and psychotherapy (3rd ed.). Brooks/cole.
Chicago Style (17th ed.) Zitazioa
Corey, Gerald. Theory and Practice of Counselling and Psychotherapy. 3rd ed. California: Brooks/cole, 1990.
MLA (9th ed.) Zitazioa
Corey, Gerald. Theory and Practice of Counselling and Psychotherapy. 3rd ed. Brooks/cole, 1990.
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