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5.3 References

“61 Billion Searches Conducted Worldwide in August,” press release, comScore, October 10, 2007, (accessed June 9, 2008).

“comScore Releases 2008 U.S. Search Engine Rankings,” press release, comScore, February 21, 2008, (accessed April 3, 2008).

“comScore Releases March 2008 European Search Rankings,” press release, comScore, May 7, 2008, (accessed June 1, 2008).

“Global Search Market Share, July 2009 vs. July 2008,” Search Engine Watch, September 1, 2009, (accessed June 24, 2010).

Rand Fishkin, The Beginner’s Guide to SEO, SEOmoz, February 25, 2006, (accessed April 3, 2008).

“Technology Overview,” Google, (accessed April 3, 2008).