Wittenberg, R. M. (1951). The art of group discipline: A mental hygiene approach to leadership. Association Press.
Lua i Stíl Chicago (17ú heag.)Wittenberg, Rudolph M. The Art of Group Discipline: A Mental Hygiene Approach to Leadership. New York: Association Press, 1951.
Lua MLA (8ú heag.)Wittenberg, Rudolph M. The Art of Group Discipline: A Mental Hygiene Approach to Leadership. Association Press, 1951.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.