Jelaskan Aristotle. Nicomachean Ethics. dari Hukum kodrat

Barham, Francis. Introduction to The Political Works of Marcus Tullius Cicero.

Blackstone, William. 1765–9. Commentaries on the Laws of England.

Botein, Stephen. 1978. "Cicero as Role Model for Early American Lawyers: A Case Study in Classical 'Influence'". The Classical Journal 73, no. 4 (April–May).

Boyer, Allen D. 2004. "Sir Edward Coke, Ciceronianus: Classical Rhetoric and the Common Law Tradition." in Law, Liberty, and Parliament: Selected Essays on the Writings of Sir Edward Coke, ed. Allen D. Boyer. Indianapolis: Liberty Fund.

Burlamaqui, Jean Jacques. 1763. The Principles of Natural and Politic Law. Trans. Thomas Nugent. Repr., Indianapolis: The Liberty Fund, 2006.

Burns, Tony. 2000. "Aquinas's Two Doctrines of Natural Law." Political Studies 48. pp. 929–46.

Carlyle, A. J. 1903.  A History of Medieval Political Theory in the West. vol. 1. Edinburgh.