APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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