1. J.F. Anderson, St. Augustine and Being, Martinus Nijhoff, The Hague, 1965.
2. P. Brown, Augustine of Hippo, Faber, London, 1967.
3. E.H. Gilson, The Christian Philosophy of Saint Augustine, Random House, New York, 1960, trans. L.E.M. Lynch.
4. A.W. Matthews, The Development of Augustine from Neoplatonism to Christianity, Uni. Press of America, Washington, 1980.
5. R.E. Meagher, An Introduction to Augustine, New York Uni. Press, New York, 1978.