Homans, G. C. (1950). The human group. Harcourt, Brace & World.
Lua i Stíl Chicago (17ú heag.)Homans, George Caspar. The Human Group. New York: Harcourt, Brace & World, 1950.
Lua MLA (9ú heag.)Homans, George Caspar. The Human Group. Harcourt, Brace & World, 1950.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.