Corey, G. (1991). Manual for theory and practice of counselling and psychotherapy (4th ed.). Brooks/cole.
Lua i Stíl Chicago (17ú heag.)Corey, Gerald. Manual for Theory and Practice of Counselling and Psychotherapy. 4th ed. California: Brooks/cole, 1991.
Lua MLA (9ú heag.)Corey, Gerald. Manual for Theory and Practice of Counselling and Psychotherapy. 4th ed. Brooks/cole, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.