James C. Humes, Benjamin Franklin (1995). “The wit and wisdom of Benjamin Franklin: a treasury of more than 900 quotations and anecdotes”, Harpercollins
Benjamin Franklin (1987). “Poor Richard's Almanack: Being the Choicest Morsels of Wisdom, Written During the Years of the Almanack's Publication”, p.49, Peter Pauper Press, Inc.
Benjamin Franklin (1806). “The Complete Works, in Philosophy, Politics, and Morals, of the Late Dr. Benjamin Franklin, Now First Collected and Arranged: With Memoirs of His Early Life”, p.79