George Santayana, Marianne S. Wokeck, Martin A. Coleman, James Gouinlock (2015). “The Life of Reason Or The Phases of Human Progress: Reason in Art, Volume VII, Book Four”, p.107, MIT Press
George Washington, Jared Sparks (1837). “The Writings of George Washington: Being His Correspondence, Addresses, Messages, and Other Papers, Official and Private, Selected and Published from the Original Manuscripts; with a Life of the Author, Notes and Illustrations”, p.8
"A Look at Organized Crime" by Woody Allen in "Disquiet, Please! More Humor Writing from the New Yorker" by David Remnick, Henry Finder, (p. 364), 2008.
"Britain's intellectuals: leading thinkers have their say" by Alain de Botton, AC Grayling, Susie Orbach, Paul Gilroy, Will Self, Mary Beard, Brian Cox, Lionel Shriver, James Lovelock and Lisa Jardine, www.theguardian.com. May 7, 2011.