1. Get smart;Cascio;The Atlantic,2009
2. Core characteristics of Web 2.0 services www.techpluto.com/web-20-services/
3. Web 2.0 http://en.wikipedia.org/wiki/Web_2.0
4. Social media http://en.wikipedia.org/wiki/Social_media
5. Nations D What is social media? What are social media sites? http://webtrends.about.com/od/web20/a/social-media.htm