(1931). Tests and challenges in sociology (for use with Ross's Principles of sociology, revised edition). The Century co.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTests and Challenges in Sociology (for Use with Ross's Principles of Sociology, Revised Edition). New York: The Century co, 1931.
एमएलए (9वां संस्करण) प्रशस्ति पत्रTests and Challenges in Sociology (for Use with Ross's Principles of Sociology, Revised Edition). The Century co, 1931.
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