Chernow, R. (1998). Titan: The Life of John D. Rockefeller, Sr. Vintage.
Lua i Stíl Chicago (17ú heag.)Chernow, Ron. Titan: The Life of John D. Rockefeller, Sr. New York: Vintage, 1998.
Lua MLA (9ú heag.)Chernow, Ron. Titan: The Life of John D. Rockefeller, Sr. Vintage, 1998.
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