1. Emergency Medical Services Systems Development Act of 1973. Hearings. 93rd Congress, 1st Session, on §504.and §654. Washington, DC: United States Congress, Senate, Committee on Labor and Public Welfare, Subcommittee on Health; 1973. pp. 691-694
2. Shah MN. The formation of the emergency medical services system. American Journal of Public Health. 2006;96(3):414-423. DOI: 10.2105/AJPH.2004.048793
3. American Board of Medical Specialties. Emergency Medical Services: Eligibility Vriteria for Certification. 2011. Available from: http://www.naemsp.org/Documents/EMSEligCriteriaFINALApril2011.pdf [Accessed: 9-7-2018]
4. Escott M. EMS Subspecialty creates an opportunity to change the role of the paramedic. JEMS: A Journal of Emergency Medical Services. 2015;40(1). https://www.jems.com/articles/print/volume-40/issue-1/departments-columns/field-physicians/ems-subspecialty-creates-opportunity-cha.html [Accessed: 10-7-2018]
5. American Board of Medical Specialties. Specialty and Subspecialty Certificates. 2011. Available from: https://www.abms.org/member-boards/specialty-subspecialty-certificates [Accessed: 10-7-2018]