1. Catechism of the Catholic Church. (2003). Catechism. London: Doubleday.
2. Dubay, T. (1985). Faith and Certitude. San Francisco: Ignatius.
3. Feser, E. (2008). The Last Superstition: A Refutation of the New Atheists. South Bend, IN: St. Augustine’s Press.
4. Feser, E. (2017). Five Proofs for the Existence of God. San Francisco: Ignatius.
5. Fradd, M., & Delfino, R. (2018). Does God Exist? A Socratic Dialogue on the Five Ways of Thomas Aquinas, St. Louis, MO: Enroute.