1. Aquinas, T. 1975. Summa Contra Gentiles, Book Three: Providence, Part II. South Bend: University of Notre Dame Press.
2. Berger, P. 1970. A Rumor of Angels: Modern Society and the Rediscovery of the Supernatural. Garden City: Doubleday & Company.
3. Buchler, J., ed. 2011. Philosophical Writings of Peirce. New York: Dover Publications.
4. Clayton, P. 2004. Mind and Emergence: From Quantum to Consciousness. Oxford: Oxford University Press.
5. Clayton, P., and S. Knapp. 2011. The Predicament of Belief: Science, Philosophy, and Faith. London: Oxford University Press.