National Conference on Parole Washington, D.C., & Bell, M. (1957). Parole in principle and practice. National Probation and Parole Association.
Lua i Stíl Chicago (17ú heag.)National Conference on Parole Washington, D.C., agus Marjorie Bell. Parole in Principle and Practice. New York: National Probation and Parole Association, 1957.
Lua MLA (8ú heag.)National Conference on Parole Washington, D.C., agus Marjorie Bell. Parole in Principle and Practice. National Probation and Parole Association, 1957.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.