FITTON ROBERT A. (1997). LEADERSHIP: QUOTATIONS FROM THE WORLD`S GREATEST MOTIVATORS. WESTVIEW PRESS.
芝加哥风格引文FITTON ROBERT A. LEADERSHIP: QUOTATIONS FROM THE WORLD`S GREATEST MOTIVATORS. OXFORD: WESTVIEW PRESS, 1997.
MLA引文FITTON ROBERT A. LEADERSHIP: QUOTATIONS FROM THE WORLD`S GREATEST MOTIVATORS. WESTVIEW PRESS, 1997.
警告：这些引文格式不一定是100％准确.