- WPP Group: 2007 Year in Review
- Group M Combines Assets to Make 'World's Largest Search Specialist'...an organic search provider; Catalyst, an organic and paid search specialist; and
Quisma, a paid search agency. The global search operation will total about 400...
- No. 2 WPP GroupAnalysis of WPP Activities in 2006, from the 2007 Agency Report
- Search Marketing Fact Pack 2008Facts and figures on search marketing