Sommer, J. A. (1950). School attitudes for youth. Queen's Work.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSommer, Joseph A. School Attitudes for Youth. St. Louis, Mo.: Queen's Work, 1950.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSommer, Joseph A. School Attitudes for Youth. Queen's Work, 1950.
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