Reference about air plane safety

Krause, Shari S. Aircraft Safety. McGraw-Hill Professional, 2003. HCT Database. Web. 15 Mar. 2010. http://0-site.ebrary.com.library.hct.ac.ae/lib/hct/docDetail.action?docID=10153000.

(2) National Academy of Engineering Staff. Improving Aircraft Safety. National Academies, 1980. HCT Database. Web. 15 Mar. 2010. .

(3) National Research Council Staff. Improving the Continued Airworthiness of Civil Aircraft: A Strategy for the FAA's Aircraft Certification Service. National Academies, 1998. HCT Database. Web. 15 Mar. 2010. .