1. Albers, K. (2007). Poll: Tougher catching cheating with online test takers, educators say. Naplesnews. Retrieved from http://www.naplesnews.com/news/2007/jul/15/tougher_catch_co
2. Allen, E., & Seaman. (2010). Class differences: Online education in the United States, 2010. Retrieved from http://sloanconsortium.org/publications/survey/survey05.asp
3. Online learner authentication: Verifying the identity of online users.;J.Bailie;Journal of Online Learning and Teaching,2009