Jacquelyn Smith, America's 20 Most Powerful CEOs 40 And Under, in Forbes, 14 febbraio 2011. URL consultato il 18 febbraio 2011.
«To make this list, you had to be the chief executive of one of the 20 biggest publicly traded companies in the U.S. (as of Feb. 11, by market capitalization) with a CEO aged 40 or under»