National Conference on Parole Washington, D.C., & Bell, M. (1957). Parole in principle and practice. National Probation and Parole Association.
Chicago-viite (17. p.)National Conference on Parole Washington, D.C., ja Marjorie Bell. Parole in Principle and Practice. New York: National Probation and Parole Association, 1957.
MLA-viite (8. p.)National Conference on Parole Washington, D.C., ja Marjorie Bell. Parole in Principle and Practice. National Probation and Parole Association, 1957.
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