Evans, Andy; Parker, John (May 2008). "Safety Management Systems"(PDF). Beyond Safety Management Systems. AeroSafety World. pp. 12–17. Archived(PDF) from the original on October 10, 2023. Retrieved July 3, 2015.
Evans, Andy; Parker, John (May 2008). "Safety Management Systems"(PDF). Beyond Safety Management Systems. AeroSafety World. pp. 12–17. Archived(PDF) from the original on October 10, 2023. Retrieved July 3, 2015.