RONALD FREEDMAN, A. H. H. (1952). PRINCIPLES OF SOCIOLOGY, A TEXT WITH READINGS. HENRY HOLT AND COMPANY.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRONALD FREEDMAN, AMOS H. HAWLEY. PRINCIPLES OF SOCIOLOGY, A TEXT WITH READINGS. HENRY HOLT AND COMPANY, 1952.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRONALD FREEDMAN, AMOS H. HAWLEY. PRINCIPLES OF SOCIOLOGY, A TEXT WITH READINGS. HENRY HOLT AND COMPANY, 1952.
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