Corey, G. (1990). Theory and practice of group counselling (3rd ed.). Brooks/Cole Publishing.
Lua i Stíl Chicago (17ú heag.)Corey, Gerald. Theory and Practice of Group Counselling. 3rd ed. California.: Brooks/Cole Publishing, 1990.
Lua MLA (9ú heag.)Corey, Gerald. Theory and Practice of Group Counselling. 3rd ed. Brooks/Cole Publishing, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.