Augustine (396–426) De doctrina christiana (On Christian Doctrine), trans.
Hill, Teaching Christianity, Hyde Park, NY: New City Press, 1996.
(A good modern translation.)
Brown, D. (1985) The Divine Trinity, London: Duckworth.
(A widely discussed book on the topic.)
Cartwright, R. (1987) ‘On the Logical Problem of the Trinity’, in Philosophical Essays, Cambridge, MA and London: MIT Press.
(A sustained, rigorous attempt to show that the logical problems faced by the doctrine of the Trinity are insoluble by any means that have so far been proposed.)
Geach, P. (1977) The Virtues, Cambridge: Cambridge University Press.
(This and the following item are Geach’s most important statements of his attempt at a solution to the logical problems presented by Trinitarian theology; see especially pages 72–81.)
Geach, P. and Anscombe, G.E.M. (1963) Three Philosophers, Oxford: Blackwell.
(See previous item; see especially pages 118–20.)
Hill, E. (1985) The Mystery of the Trinity, London: Geoffrey Chapman.
(A very useful exposition of Augustine and Aquinas on the Trinity.)
Hodgson, L. (1940) The Doctrine of the Trinity, New York: Scribner.
McGrath, A.E. (1994) Christian Theology: An Introduction, Oxford: Blackwell.
(Recommended for readers with no background in theology or church history. Clear and reliable.)
Martinich, A.P. (1978) ‘Identity and Trinity’, Journal of Religion
(An attempt at a Geach-style solution to the logical problems of the Trinity. More systematic than Geach.)
Swinburne, R. (1988) ‘Could There Be More Than One God?’, Faith and Philosophy
(Swinburne’s account of the Trinity.)
Tertullian, Q.S.F. (c.213) Adversus Praxean (Against Praxeas), trans.
Souter, London: SPCK, 1920.
(Contains Tertullian’s treatment of the Trinity; this is the source of the technical terminology used in Latin Christian discussions.)
Van Inwagen, P. (1988) ‘And Yet They Are Not Three Gods but One God’, in T.V.
Morris (ed.) Philosophy and the Christian Faith, South Bend, IN: University of Notre Dame Press.
(An attempt at a Geach-style solution to the logical problems of the Trinity. A broader range of problems than those considered by Geach and Martinich is addressed. This essay may be consulted for further references.)