Eleanor Roosevelt, Allida Mae Black (2013). “Courage in a Dangerous World: The Political Writings of Eleanor Roosevelt”, p.258, Columbia University Press
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.
"SUNDAY INTERVIEW -- A Statesman And a Man Of Faith / With a lifetime of public service to his credit, the former president reflects on the beliefs that have sustained him". Interview with Don Lattin, www.sfgate.com. January 12, 1997.