1. National Center of Education Statistics. “Fast Facts: How Many Students Take Distance Learning Courses at the Postsecondary Level?”. http://nces.ed.gov/fastfacts/display.asp?id=80(accessed November 15, 2011)
2. Library services to distant students: An equity issue
3. Kelderman. “Online Programs”. B4
4. Harkin, Tom. “Iowa's Senator, “For-Profit College Investigation,”. http://harkin.senate.gov/help/forprofitcolleges.cfm(accessed January 23, 2012)