Levintow, D. (1961). Worker's education: Study guide. University of the Philippines, Asian Labor Education Center.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLevintow, David. Worker's Education: Study Guide. Quezon City: University of the Philippines, Asian Labor Education Center, 1961.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLevintow, David. Worker's Education: Study Guide. University of the Philippines, Asian Labor Education Center, 1961.
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