Não informado. (1960). Current literature. National Foundation, Department of Professional Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Current Literature. New York: National Foundation, Department of Professional Education, 1960.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Current Literature. National Foundation, Department of Professional Education, 1960.
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