United States Government Accountability Office. Report to Congressional Requestors, Emergency Management: Improved Federal Coordination Could Better Assist K-12 Schools Prepare for Emergencies. March 2016. https://www.gao.gov/assets/680/675737.pdf
City of Olympia, WA. “Active Shooter Training Preparation.” http://olympiawa.gov
osha.gov
Occupational Safety and Health Administration (2017) Enforcement Procedures and Scheduling for Occupational Exposure to Workplace Violence (CPL-02-01-058). Washington, D.C. https://www.osha.gov/enforcement/directives/cpl-02-01-058
Occupational Safety and Health Administration (2016). Guidelines for Preventing Workplace Violence for Healthcare and Social Service Workers (3148-06R). Washington, D.C. https://www.osha.gov/Publications/osha3148.pdf