5Mayfield, Anthony. What is Social Media? [ EB/OL]. < http://www. Icrossing. Co. uk/fileadmin/ uploads/eBooks/ What is Social_Media_iCrossing_ebook. pdf >.
6Kaplan, A. M. , & Haenlein, M. Users of the world, unite! The challenges and opportunities of Social Media [ J ]. Business Horizons, 2010,53( 1 ) : 59 - 68.
7Stefan Hrastinski & Naghmeh M. Aghaee. How are campus students using social media to support their studies? An explorative interview study [ J ]. Education Information Technolo- gy, 2012,(17) :451 -464.
8Egan, K. G, & Moreno, M.A. Alcohol references on undergraduate males' facebook profiles [ J ]. American Journal of Men's Health, 2011,5 (5) : 413 - 420. doi: 10. 1177/ 1557988310394341.
9Rideout, V.J. , Foehr,U. G. , & Roberts, D. Genera- tion M2: Media in the lives of 8 to 18 years olds[ R]. Menlo Park : Kaiser Family Foundation, 2010.
10Rankin, M. Some general comments on the "Twitter Experiment" [ EB/OL . < http://www, utdallas, edu/- mar046000/usweb/twitterconclusions, htm. >.