Não informado. (1964). American education. Office of Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. American Education. Washington: Office of Education, 1964.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. American Education. Office of Education, 1964.
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