1. Alston W. (1991). Perceiving God: The epistemology of religious experience. Cornell UP, Ithaca
2. Aquinas T. (1967). Summa Theologiae. Blackfriars in conjunction with Eyre and Spottiswoode, London
3. Aquinas T. (1989). Summa Theologiae. In: McDermott T. (eds) Summa Theologiae: A concise translation. (tr. William Wallace). Methuen, London
4. Augustine (1991). Confessions. University Press, Oxford. tr. Henry Chadwick.
5. Banner M. (1999). Christian ethics and contemporary moral problems. Cambridge University Press, Cambridge