National Highway Traffic Safety Administration. (2005). The National EMS Scope of Practice Model. Washington, DC: U.S. Department of Transportation/Author.
2.
U.S. Department of Labor, Occupational Safety and Health Administration. (1999, rev.). The occupational health professional's services and qualifications: Questions and answers (OSHA Publication no. 3160). Retrieved from www.osha.gov/Publications/osha3160.pdf