Perryman, W. (1990). School administrator's handbook on gangs & campus violence. Puget Sound Educational Service District.
Chicago-Zitierstil (17. Ausg.)Perryman, Wayne. School Administrator's Handbook on Gangs & Campus Violence. Seattle, Wash: Puget Sound Educational Service District, 1990.
MLA-Zitierstil (8. Ausg.)Perryman, Wayne. School Administrator's Handbook on Gangs & Campus Violence. Puget Sound Educational Service District, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.