Ramsoy, O. 1. (1963). Social groups as system and subsystem ([1st American ed.].). Free Press of Glencoe.
Lua i Stíl Chicago (17ú heag.)Ramsoy, Odd 1924. Social Groups as System and Subsystem. [1st American ed.]. New York: Free Press of Glencoe, 1963.
Lua MLA (9ú heag.)Ramsoy, Odd 1924. Social Groups as System and Subsystem. [1st American ed.]. Free Press of Glencoe, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.