National Conference on Parole Washington, D.C., & Bell, M. (1957). Parole in principle and practice. National Probation and Parole Association.
Citazione stile Chigago Style (17a edizione)National Conference on Parole Washington, D.C., e Marjorie Bell. Parole in Principle and Practice. New York: National Probation and Parole Association, 1957.
Citatione MLA (8a ed.)National Conference on Parole Washington, D.C., e Marjorie Bell. Parole in Principle and Practice. National Probation and Parole Association, 1957.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.