References
- Butterfield, G.. (Speaker) (1994). School violence. (Video). Norristown, PA: Montgomery County Intermediate Unit.
- Erb, T. O. (Ed.). (1996). The future of safe schools (theme issue). Middle School Journal, 27(3), 2–51
- National Association of Secondary School Principals. (1994). Student/parent/principal contract for eliminating guns and weapons from schools. Reston, VA: Author.