Não informado. (1950). Adult Education. American Association for Adult & Continuing Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Adult Education. Chapel Hill, NC: American Association for Adult & Continuing Education, 1950.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Adult Education. American Association for Adult & Continuing Education, 1950.
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