Benjamin Franklin (1987). “Poor Richard's Almanack: Being the Choicest Morsels of Wisdom, Written During the Years of the Almanack's Publication”, p.16, Peter Pauper Press, Inc.
Richard Dawkins' Speech at the Edinburgh International Science Festival (April 15, 1992); quoted in "EDITORIAL: A scientist's case against God", "The Independent"(London), (p. 17), April 20, 1992.
John Adams, Abigail Adams, Thomas Jefferson (1988). “The Adams-Jefferson Letters: The Complete Correspondence Between Thomas Jefferson and Abigail and John Adams”