"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.
George Washington, John Clement Fitzpatrick, David Maydole Matteson (1777). “The Writings of George Washington from the Original Manuscript Sources, 1745-1799”, p.73
Edward Gibbon, J. B. Bury (2013). “The History of the Decline and Fall of the Roman Empire: Edited in Seven Volumes with Introduction, Notes, Appendices, and Index”, p.257, Cambridge University Press
Edward Gibbon (2016). “THE HISTORY OF THE DECLINE AND FALL OF THE ROMAN EMPIRE (All 6 Volumes): From the Height of the Roman Empire, the Age of Trajan and the Antonines - to the Fall of Byzantium; Including a Review of the Crusades, and the State of Rome during the Middle Ages”, p.3284, e-artnow