Levintow, D. (1961). Worker's education: Study guide. University of the Philippines, Asian Labor Education Center.
Chicago-referens (17:e uppl.)Levintow, David. Worker's Education: Study Guide. Quezon City: University of the Philippines, Asian Labor Education Center, 1961.
MLA-referens (9:e uppl.)Levintow, David. Worker's Education: Study Guide. University of the Philippines, Asian Labor Education Center, 1961.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.