Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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