APA (7th ed.) Zitazioa

Patterson, C. H., & Watkins, C. E. (1973). Theories of counseling and psychotherapy. Harper Collins.

Chicago Style (17th ed.) Zitazioa

Patterson, C. H., eta C. Edward Watkins. Theories of Counseling and Psychotherapy. New York: Harper Collins, 1973.

MLA (9th ed.) Zitazioa

Patterson, C. H., eta C. Edward Watkins. Theories of Counseling and Psychotherapy. Harper Collins, 1973.