• R.J. Henle (ed. and trans.), St Thomas Aquinas: the Treatise on Law (Notre Dame: 1993).

• J. Finnis, Aquinas: Moral, Political, and Legal Theory (Oxford: 1988).

• J. Goyette, M. Latvic, and R.S. Myers (eds), St. Thomas Aquinas and the Natural Law Tradition: Contemporary Perspectives (Washington DC: 2004).

• M.M. Keys, Aquinas, Aristotle and the Promise of the Common Good (Cambridge: 2006).

• A. Lisska, Aquinas’ Theory of Natural Law: An Analytic Reconstruction (Oxford: 1996).

• O. Lottin, Le droit naturel chez St Thomas d’Aquin es ses prédécesseurs (Bruges: 1931).

• D.M. Nelson, The Priority of Prudence: Virtue and Natural Law in Thomas Aquinas and the Implications for Modern Ethics (University Park PA: 1992).