1. Anon (2009) Facebook faces criticism on privacy change. BBC.
http://news.bbc.co.uk/1/hi/8405334.stm
2. Ante SE (2009) Content-search deals make Twitter profitable. BusinessWeek.
http://www.businessweek.com/technology/content/dec2009/tc20091220_549879.htm
3. Ante SE (2010) Foursquare locates new funds to expand. Wall Str J.
http://online.wsj.com/article/SB10001424052748704846004575333222375027784.html
4. Appleyard D, Gerson MS, Lintell M (1981) Livable streets. University of California Press, Berkeley
5. Asrianti T (2011) Cheap smartphones change RI internet behavior: survey. The Jacarta Post.
http://www.thejakartapost.com/news/2011/05/31/cheap-smartphones-change-ri-internet-behavior-survey.html