APA (7th ed.) Zitazioa

Tudor, K. (1999). Group counselling. Sage Publications.

Chicago Style (17th ed.) Zitazioa

Tudor, Keith. Group Counselling. London ; Thousand Oaks, CA: Sage Publications, 1999.

MLA (9th ed.) Zitazioa

Tudor, Keith. Group Counselling. Sage Publications, 1999.