Blauvelt, P. D., & Vestermark, S. D. (1977). School security: How to develop and effective program for safe learning in elementary and secondary schools. Institute for Reduction of Crime.
Chicago-Zitierstil (17. Ausg.)Blauvelt, Peter D., und Seymour D. Vestermark. School Security: How to Develop and Effective Program for Safe Learning in Elementary and Secondary Schools. College Park, Md: Institute for Reduction of Crime, 1977.
MLA-Zitierstil (8. Ausg.)Blauvelt, Peter D., und Seymour D. Vestermark. School Security: How to Develop and Effective Program for Safe Learning in Elementary and Secondary Schools. Institute for Reduction of Crime, 1977.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.