George Washington, John Jay, Jared Sparks (1850). “Washington's Farewell Address to the People of the United States of America”, p.38, New York : J. Wiley
Theodore Roosevelt (2015). “Theodore Roosevelt on Bravery: Lessons from the Most Courageous Leader of the Twentieth Century”, p.36, Skyhorse Publishing, Inc.
Douglas MacArthur's speech to the Texas Legislature in Austin (June 13, 1951) as quoted in "General MacArthur Speeches and Reports 1908-1964" edited by Edward T. Imparato (p. 175), June 14, 2000.
"Pope Francis: 'I’m not a star, but the servant of servants of God'". Vatican Radio translation of Pope Francis' press conference, www.news.va. September 28, 2015.