Thomas Jefferson, Henry Augustine Washington (1854). “The Writings of Thomas Jefferson: Being His Autobiography, Correspondence, Reports, Messages, Addresses, and Other Writings, Official and Private : Published by the Order of the Joint Committee of Congress on the Library, from the Original Manuscripts, Deposited in the Department of State”, p.379
Thomas Jefferson (1854). “The Writings of Thomas Jefferson: Inaugural addresses and messages. Replies to public addresses. Indian addresses. Miscellaneous: 1. Notes on Virginia; 2. Biographical sketches of distinguished men; 3. The batture of New Orleans”, p.400
John Adams' letter to Benjamin Rush (December 21, 1809), as quoted in "No, Mr. Beck, John Adams Did Not Think Governments Must Be Administered by the Holy Ghost" by Chris Rodda, www.huffingtonpost.com. June 16, 2010.