Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.