Frederick Lewis Allen, The Great Pierpont Morgan (New York, New York: Harper, 1949).

Roger Burlingame, Henry Ford: A Great Life in Brief (New York, New York: Knopf, 1955).

Andrew Carnegie, Autobiography (New York, New York: Houghton Mifflin, 1920).

Thomas Cochran and William Miller, The Age of Enterprise (New York, New York: Harper, 1961).

Burton Hendrick, The Life of Andrew Carnegie (Garden City, New Jersey: Doubleday, 1932).

Stewart H. Holbrook, The Age of Moguls (Garden City, New Jersey: Doubleday, 1953).

Stewart H. Holbrook, James J. Hill: A Great Life in Brief (New York, New York: Knopf, 1955).

Matthew Josephson, The Robber Barons (New York, New York: Harcourt, 1934).

Edward C. Kirkland, Industry Comes of Age (New York, New York: Holt, 1961).

Wheaton J. Lane, Commodore Vanderbilt (New York, New York: Knopf, 1942).

Milton Lomask, Seed Money: The Guggenheim Story (New York, New York: Farrar, Straus, 1964).

Gustavus Myers, History of the Great American Fortunes (New York, New York: Random House, 1936).

Allan Nevins, John D. Rockefeller: The Heroic Age of American Enterprise (New York, New York: Scribner’s, 1940).

Allan Nevins, Study in Power: John D. Rockefeller, Industrialist and Philanthropist (New York, New York: Scribner’s, 1953).

Allan Nevins and Frank Hill, Ford: The Times, The Man, The Company (New York, New York: Scribner’s, 1954).

Allan Nevins and Frank Hill, Ford: Expansion and Challenge (New York, New York: Scribner’s, 1957).

Allan Nevins and Frank Hill, Ford: Decline and Rebirth (New York, New York: Scribner’s, 1963).

Joseph Gilpin Pyle, The Life of James J. Hill (Garden City, New Jersey: Doubleday, 1917).

William C. Richards, The Last Billionaire (New York, New York: Scribner’s, 1948).