1. American Medical Association. Protecting Adolescents from Harm: National Longitudinal Study. Chicago: American Medical Association, 1996.
2. California Safe Schools Assessment. Sacramento: California State Department of Education, 1999.
3. Measuring individual differences in empathy: Evidence for a multidimensional approach.
4. Lost Boys: Why Our Sons Turn Violent and How We Can Save Them. New York: Simon & Schuster, 1999.