5.3 References

“61 Billion Searches Conducted Worldwide in August,” press release, comScore, October 10, 2007, http://www.comscore.com/press/release.asp?press=1802 (accessed June 9, 2008).

“comScore Releases 2008 U.S. Search Engine Rankings,” press release, comScore, February 21, 2008, http://www.comscore.com/press/release.asp?press=2068 (accessed April 3, 2008).

“comScore Releases March 2008 European Search Rankings,” press release, comScore, May 7, 2008, http://www.comscore.com/press/release.asp?press=2208 (accessed June 1, 2008).

“Global Search Market Share, July 2009 vs. July 2008,” Search Engine Watch, September 1, 2009, http://searchenginewatch.com/3634922 (accessed June 24, 2010).

Rand Fishkin, The Beginner’s Guide to SEO, SEOmoz, February 25, 2006, http://www.seomoz.org/article/beginners-guide-to-search-engine-optimization (accessed April 3, 2008).

“Technology Overview,” Google, http://www.google.com/technology (accessed April 3, 2008).