Cita APA (7th ed.)
Whitfield, D., & Nellis, M. (2001). Introduction to the probation service (2nd ed.). Waterside Press.
Cita Chicago (17th ed.)
Whitfield, Dick, i Mike Nellis. Introduction to the Probation Service. 2nd ed. Winchester: Waterside Press, 2001.
Cita MLA (9th ed.)
Whitfield, Dick, i Mike Nellis. Introduction to the Probation Service. 2nd ed. Waterside Press, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.