Alexander Hamilton, Donald R. Hickey, Connie D. Clark (2006). “Citizen Hamilton: The Wit and Wisdom of an American Founder”, p.142, Rowman & Littlefield
John Locke (1824). “Of human understanding. A defence of Mr. Locke's opinion concerning personal identity. Of the conduct of the understanding. Some thoughts concerning reading and study for a gentleman. Elements of natural philosophy. A new method of common-place-book”, p.29