FITTON ROBERT A. (1997). LEADERSHIP: QUOTATIONS FROM THE WORLD`S GREATEST MOTIVATORS. WESTVIEW PRESS.
Lua i Stíl Chicago (17ú heag.)FITTON ROBERT A. LEADERSHIP: QUOTATIONS FROM THE WORLD`S GREATEST MOTIVATORS. OXFORD: WESTVIEW PRESS, 1997.
Lua MLA (9ú heag.)FITTON ROBERT A. LEADERSHIP: QUOTATIONS FROM THE WORLD`S GREATEST MOTIVATORS. WESTVIEW PRESS, 1997.
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