National Conference on Parole Washington, D.C., & Bell, M. (1957). Parole in principle and practice. National Probation and Parole Association.

National Conference on Parole Washington, D.C., and Marjorie Bell. Parole in Principle and Practice. New York: National Probation and Parole Association, 1957.

National Conference on Parole Washington, D.C., and Marjorie Bell. Parole in Principle and Practice. National Probation and Parole Association, 1957.