Brands, H. W. (1999). Masters of enterprise: Giants of American business from John Jacob Astor and J. P. Morgan to Bill Gates and Oprah Winfrey. The Free Press.
Lua i Stíl Chicago (17ú heag.)Brands, H. W. Masters of Enterprise: Giants of American Business from John Jacob Astor and J. P. Morgan to Bill Gates and Oprah Winfrey. New York, N. Y: The Free Press, 1999.
Lua MLA (9ú heag.)Brands, H. W. Masters of Enterprise: Giants of American Business from John Jacob Astor and J. P. Morgan to Bill Gates and Oprah Winfrey. The Free Press, 1999.
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