2Antenos-Conforti, Enza. The Next Generation: Social Networking and Online Collaboration in Foreign Language Learning [M].Calico Monograph Series,2009.
3Dunlap,J.C.,and Lowenthal,ER..(2008).Tweeting the Night Away: Using Twitter to Enhance Social Presence[J]. J oumal of Information Systems Education, 2008,(2) :45-51.