1. Bayne, R.(1995) The Myers–Briggs type indicator: a critical review and practical guide. London : Chapman and Hall.
2. Butler, A.(1999) Personality and communicating the Gospel. Cambridge : Grove Books.
3. Duncan, B.(1993) Pray your way. London : Darton, Longman and Todd.
4. Francis, L. J. (2001) Personality type and communicating the gospel Modern Believing, 42((1)), pp. 32 - 46.
5. Francis, L. J. (2003) Psychological type and biblical hermeneutics: SIFT method of preaching Rural Theology, 1((1)), pp. 13 - 23.