John Adams (1794). “A Defence of the Constitutions of Government of the United States of America: Against the Attack of M. Turgot in His Letter to Dr. Price, Dated the Twenty-second Day of March, 1778”, p.475
"A Defence of the Constitutions of Government". Book by John Adams. Chapter 3: "Marchamont Nedham: Errors of Government and Rules of Policy", Sixth Rule, 1787.