- Martin Sorrell steps down as CEO of advertising giant WPPWashington Post
- Martin Sorrell’s legacy will be judged by WPP’s durabilityFinancial Times
- Martin Sorrell Quits As Head Of World’s Biggest Ad Group WPPInternational Business Times
- WPP CEO Sorrell’s final thoughts on PRPRWeek
- WPP CEO Sorrell Quits After Three Decades Building Ad EmpireBloomberg