Não informado. (1940). Main Currents in Modern Thought. Center for Integrated Education.
Cita Chicago Style (17a ed.)Não informado. Main Currents in Modern Thought. New York: Center for Integrated Education, 1940.
Cita MLA (8a ed.)Não informado. Main Currents in Modern Thought. Center for Integrated Education, 1940.
Precaución: Estas citas no son 100% exactas.