John Adams, Abigail Adams, Thomas Jefferson (1988). “The Adams-Jefferson Letters: The Complete Correspondence Between Thomas Jefferson and Abigail and John Adams”
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.
Thomas Jefferson (2011). “The Papers of Thomas Jefferson, Retirement Series, Volume 7: 28 November 1813 to 30 September 1814”, p.248, Princeton University Press
James C. Humes, Benjamin Franklin (1995). “The wit and wisdom of Benjamin Franklin: a treasury of more than 900 quotations and anecdotes”, Harpercollins
John Adams, Charles Francis Adams (1856). “The Works of John Adams, Second President of the United States: With a Life of the Author, Notes and Illustrations”, p.235
Thomas Paine (2016). “THE AGE OF REASON - Investigation of True and Fabulous Theology (Including “The Life of Thomas Paine”): Deistic Critique of Bible and Christian Church”, p.99, e-artnow
Benjamin Franklin (1817). “The private correspondence of Benjamin Franklin, LL.D, F.R.S., &c. Minister Plenipontentiary from the United States of America at the court of France, and for the Treaty of Peace and Independence with Great Britain, &c. &c: comprising a series of letters on miscellaneous, literary, and political subjects written between the years 1753 and 1790, illustrating the memoirs of his public and private life, and developing the secret history of his political transactions and negociations”, p.69