George Washington, David Maydole Matteson, United States George Washington Bicentennial Commission (1778). “The writings of George Washington from the original manuscript sources, 1745-1799”, p.286
Douglas MacArthur's address to the Annual Stockholders Sperry Rand Corporation in New York (July 30, 1957) as quoted in "General MacArthur Speeches and Reports 1908-1964" edited by Edward T. Imparato (p. 206), June 14, 2000.
Title of speech to the people of Japan, May 3, 1948, upon the first anniversary of the Japanese constitution. MacArthur, A Soldier Speaks (1965), p. 194. Francis T. Miller, General Douglas MacArthur, Fighter for Freedom, p. 1, 1942.
Theodore Roosevelt (2015). “Theodore Roosevelt on Bravery: Lessons from the Most Courageous Leader of the Twentieth Century”, p.39, Skyhorse Publishing, Inc.