APA

Patterson C H,, . (1980). Theories of counselling and psychotherapy. New York: Haper & Row Publishers.

Chicago

Patterson C H,, . 1980. Theories of counselling and psychotherapy. New York: Haper & Row Publishers.

Harvard

Patterson C H,, . (1980). Theories of counselling and psychotherapy. New York: Haper & Row Publishers.

MLA

Patterson C H,, . Theories of counselling and psychotherapy. New York: Haper & Row Publishers. 1980.