5 sources

http://www.theatlantic.com/magazine/archive/2012/05/is-facebook-making-us-lonely/308930/

http://www.forbes.com/sites/alicegwalton/2012/04/05/the-true-costs-of-facebook-addiction-low-self-esteem-and-poor-body-image/

http://topics.nytimes.com/top/news/business/companies/facebook_inc/index.htmlhttp

http://www.theage.com.au/technology/technology-news/students-face-up-to-the-pros-and-cons-of-facebook-20110320-1c298.html

http://www.washingtonpost.com/wp-dyn/content/article/2010/03/13/AR2010031300090.