Benjamin Franklin (1848). “The works of Dr. Benjamin Franklin: Consisting of essays, humorous, moral, and literary: with his life, written by himself”, p.209, S. Andrus
Benjamin Franklin, William-Temple Franklin (1818). “Memoirs of the Life and Writings of (the Same), Continued to the Time of His Death by William Temple Franklin. - London, H. Colburn 1818”, p.177