1. Allen, I. E., & Seaman, J. (2010). Learning on demand: Online education in the United States, 2009. Retrieved January 26, 2010 from http://www.sloan-c.org/publications/survey/pdf/learningondemand.pdf
2. Ambivalence. (2010, May 14). In Wikipedia, the free encyclopedia. Retrieved May 24, 2010, from http://en.wikipedia.org/wiki/Ambivalence
3. A hybrid campus for a new millennium.;R.Bleed;EDUCAUSE Review,2001