Dyfyniad APA

Corey, G. (1990). Theory and practice of group counselling (3rd ed.). Brooks/Cole Publishing.

Dyfyniad Arddull Chicago

Corey, Gerald. Theory and Practice of Group Counselling. 3rd ed. California.: Brooks/Cole Publishing, 1990.

Dyfyniad MLA

Corey, Gerald. Theory and Practice of Group Counselling. 3rd ed. Brooks/Cole Publishing, 1990.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.