Learned, W. S. (1932). Realism in American education. Harvard University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLearned, William S. Realism in American Education. Cambridge: Harvard University Press, 1932.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLearned, William S. Realism in American Education. Harvard University Press, 1932.
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