National Conference on Parole Washington, D.C., & Bell, M. (1957). Parole in principle and practice. National Probation and Parole Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Conference on Parole Washington, D.C., और Marjorie Bell. Parole in Principle and Practice. New York: National Probation and Parole Association, 1957.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNational Conference on Parole Washington, D.C., और Marjorie Bell. Parole in Principle and Practice. National Probation and Parole Association, 1957.
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