(en-US) Associated Press, « Japan's Tsutsumi Still Tops Forbes' Richest List », Los Angeles Times, (ISSN0458-3035, lire en ligne, consulté le )
(en-US) The Associated Press, « Japanese Head Forbes Wealth List », The New York Times, (ISSN0362-4331, lire en ligne, consulté le )
(en-US) « Two Japanese Top Forbes List », The New York Times, (ISSN0362-4331, lire en ligne, consulté le )
(en-US) From Associated Press, « Software Guru Bill Gates Tops 'Richest' List : Wealth: Microsoft's founder is worth $6.3 billion, Forbes says. Entertainment mogul John Kluge is ranked second. », Los Angeles Times, (ISSN0458-3035, lire en ligne, consulté le )
(en-US) From Times Staff et Wire Reports, « Bill Gates Tops List in Forbes Ranking of Richest in U.S. : Wealth: Microsoft mogul's net worth is $9.35 billion. California still home to more of wealthiest than any other state. », Los Angeles Times, (ISSN0458-3035, lire en ligne, consulté le )
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(en-US) Associated Press, « Japan's Tsutsumi Still Tops Forbes' Richest List », Los Angeles Times, (ISSN0458-3035, lire en ligne, consulté le )
(en-US) From Associated Press, « Software Guru Bill Gates Tops 'Richest' List : Wealth: Microsoft's founder is worth $6.3 billion, Forbes says. Entertainment mogul John Kluge is ranked second. », Los Angeles Times, (ISSN0458-3035, lire en ligne, consulté le )
(en-US) From Times Staff et Wire Reports, « Bill Gates Tops List in Forbes Ranking of Richest in U.S. : Wealth: Microsoft mogul's net worth is $9.35 billion. California still home to more of wealthiest than any other state. », Los Angeles Times, (ISSN0458-3035, lire en ligne, consulté le )