Não informado. (1940). Main Currents in Modern Thought. Center for Integrated Education.
Lua i Stíl Chicago (17ú heag.)Não informado. Main Currents in Modern Thought. New York: Center for Integrated Education, 1940.
Lua MLA (8ú heag.)Não informado. Main Currents in Modern Thought. Center for Integrated Education, 1940.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.