1. The expanding role of the loss prevention professional-Past, present, and future;Hendershot;Process Saf Prog,2007
2. Available at: http://www.wsu.edu/∼dee/MESO/CODE.HTM, accessed February 4, 2009.
3. Available at: http://www.midcontinent.org/rollingstock/builders/TracyFales.htm, accessed February 4, 2009.
4. Available at: http://www.psig.sg/Birth%20of%20a%20Code.html, accessed February 4, 2009.
5. Available at: http://www.asme.org/Communities/History/ASMEHistory/Brief_History.cfm, accessed February 4, 2009.