1. Burbules, N. C. (1990). The tragic sense of education. Teachers College Record, 91(4), 469–479.
2. Christensen, C. M., Baumann, H., Ruggles, R., & Sadtler, T. M. (2006, December). Disruptive innovation for social change. Harvard Business Review. https://hbr.org/2006/12/disruptive-innovation-for-social-change
3. Congressional Record. (1995, August). http://www.gpo.gov/fdsys/pkg/CREC-1995-08-05/html/CREC-1995-08-05-pt1-PgE1660-3.htm
4. Stoll, C. (1995). Silicon snake oil: Second thoughts on the information highway. New York: Doubleday.
5. Tedlow, R. (1996). New and improved: The story of mass marketing in america. Cambridge, MA: Harvard Business School Press.