Thich Nhat Hanh, John Stanley, David Loy, Mary Evelyn Tucker, John Grim (2013). “Spiritual Ecology: The Cry of the Earth”, p.97, The Golden Sufi Center
Charles Dickens (1867). “Charles Dickens's works. Charles Dickens ed. [18 vols. of a 21 vol. set. Wanting A child's history of England; Christmas stories; The mystery of Edwin Drood].”, p.25
Marshall McLuhan, W. Terrence Gordon, Elena Lamberti, Dominique Scheffel-Dunand (2011). “The Gutenberg Galaxy: The Making of Typographic Man”, p.183, University of Toronto Press
Carl Levin's opening statement before U.S. Senate Permanent Subcommittee on Investigations on Wall Street Bank Involvement With Physical Commodities at Dirksen Senate Office Building in Washington, D.C., www.hsgac.senate.gov. November 20, 2014.