1. St. Thomas Aquinas, Summa Theologica, in Basic Writings of St. Thomas Aquinas, 2 vols, ed. Anton C. Pegis, (New York: Random House, 1945).
2. John Baillie, The Idea of Revelation in Recent Thought (New York: Columbia University Press, 1956).
3. Martin Buber, Two Types of Faith, trans. Norman P. Goldhawk (New York: Harper & Row 1961).
4. John Calvin, Institutes of the Christian Religion–1536, in John Calvin: Selections from His Writings, ed. John Dillenberger (n.p.: Scholars Press, 1975).
5. Fyodor Dostoyevsky, The Brothers Karamazov, trans. David Magarshack (Baltimore MD: Penguin Books, 1958).