↑ One of the world's first and biggest multinationals—see Daniel Yergin, The Prize: The Epic Quest for Oil, Money, and Power. New York: Simon & Schuster, 1991, p.35.
↑ Hidy, Ralph W. and Muriel E. Hidy. Pioneering in Big Business, 1882–1911: History of Standard Oil Co. (New Jersey) (1955).
↑ David O. Whitten and Bessie Emrick Whitten, Handbook of American Business History: Manufacturing (Greenwood Publishing Group, 1990) p182
