1. Vignettes on Surgery, History and Humanities
2. Nobel Laureate Surgeons
3. Stanford discovers why business loyalty programs work. Silicon Valley/San Jose Business Journal Online, Accessed July 17, 2006. Available at: http://sanjose.bizjournals.com/sanjose/stories/2004/08/16/daily2.html, [CSA]
4. Loyalty. Wikipedia. Accessed May 2, 2006. Available at: http://en.wikipedia.org/wiki/Loyalty