APA (7th ed.) Zitazioa
Corey, G. (1990). Theory and practice of group counseling (3rd ed.). Brooks.
Chicago Style (17th ed.) Zitazioa
Corey, Gerald. Theory and Practice of Group Counseling. 3rd ed. Pacific Grove: Brooks, 1990.
MLA (9th ed.) Zitazioa
Corey, Gerald. Theory and Practice of Group Counseling. 3rd ed. Brooks, 1990.
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