George, Robert P. In Defense of Natural Law. Oxford: Oxford University Press, 2001.
VanDrunen, David. Divine Covenants and Moral Order : A Biblical Theology of Natural Law. Emory University Studies in Law and Religion. Grand Rapids, Michigan: William B. Eerdmans Publishing, 2014.
VanDrunen, David. Natural Law and the Two Kingdoms : A Study in the Development of Reformed Social Thought. Emory University Studies in Law and Religion. Grand Rapids, Mich.: William B. Eerdmans Pub, 2010.
VanDrunen, David. A Biblical Case for Natural Law. Studies in Christian Social Ethics and Economics, No. 1. Grand Rapids, MI: Acton Institute, 2006.
Grabill, Stephen John. Rediscovering the Natural Law in Reformed Theological Ethics. Emory University Studies in Law and Religion. Grand Rapids, Mich.: William B. Eerdmans Pub, 2006.