6Michael Tonry, "Intermediate Sanctions in Sentencing Guidelines" National Institute of Justice, Office of Justice Programs, u.s. Department of Justice, May 1997.
7Joan Petersilia, Susan Turner "Evaluating Intensive Supervision Probation/Parole: Results of a Nationwide Experiment" National Institute of Justice, Office of Justice Programs, U.S. Department of Justice, May 1993.
8Michael Tonry, "Intermediate Sanctions in Sentencing Guidelines" National Institute of Justice, Office of Justice Programs, U.S. Department of Justice, May 1997:.