참고문헌

1. TechCrunch, "Facebook No Longer The Second Largest Social Network", 2008. 6. 12.
2. TechCrunch, "As It Celebrates Its Sixth Birthday, Facebook Surges to 400 Million Users", 2010. 2. 4.
3. OpenSocial - Google Code, http://code.google.com/apis/opensocial
4. Facebook Statistics, http://www.facebook.com/press/info.php?statistics
5. Inside Facebook, "RockYou Acquires Pieces of Flair, Speed Racing", 2008. 7. 11.
6. TechCrunch, "Zynga Raises $29 Million B Round (Led By Kleiner Perkins) and Buys Virtual-World Facebook App YoVille", 2008. 7. 22.
7. TechCrunch, "Not Playing Around. EA Buys Playfish For $300 Million, Plus a $100 Million Earnout", 2009. 11. 9.
8. TechCrunch, "Chris DeWolfe Makes His Move - Raises Big Round, Acquires Gaming Platform MindJolt", 2010. 3. 3.
9. TechCrunch, "Playdom Acquires Facebook Game Developer Offbeat Creations", 2010. 3. 3.