Philpott, D. (2010). School security: A physical security handbook for school security managers, desk reference to support new or updated security plans, five step process - checklists - updated best practices. Government Training.
Chicago-Zitierstil (17. Ausg.)Philpott, Don. School Security: A Physical Security Handbook for School Security Managers, Desk Reference to Support New or Updated Security Plans, Five Step Process - Checklists - Updated Best Practices. Longboat Key, Florida: Government Training, 2010.
MLA-Zitierstil (8. Ausg.)Philpott, Don. School Security: A Physical Security Handbook for School Security Managers, Desk Reference to Support New or Updated Security Plans, Five Step Process - Checklists - Updated Best Practices. Government Training, 2010.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.