Joseph Story (1851). “Commentaries on the Constitution of the United States: With a Preliminary Review of the Constitutional History of the Colonies and States, Before the Adoption of the Constitution”, p.296
James Madison, Gaillard Hunt, James Brown Scott (1999). “The Debates in the Federal Convention of 1787: Which Framed the Constitution of the United States of America”, p.690, The Lawbook Exchange, Ltd.
George Washington, J. M. Williams (1800). “Washington's political legacies: To which is annexed an appendix, containing an account of his illness, death, and the national tributes of respect paid to his memory, with a biographical outline of his life and character”, p.90