APA (7e ed.) Bronvermelding

Corey, G. (1990). Theory and practice of counselling and psychotherapy (3rd ed.). Brooks/cole.

Chicago (17e ed.) Bronvermelding

Corey, Gerald. Theory and Practice of Counselling and Psychotherapy. 3rd ed. California: Brooks/cole, 1990.

MLA (9e ed.) Bronvermelding

Corey, Gerald. Theory and Practice of Counselling and Psychotherapy. 3rd ed. Brooks/cole, 1990.