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2. Budd, R. J. (1997). Manual for jung type indicator. Bedford: Psytech International.
3. Butler, A. (1999). Personality and communicating the gospel. Cambridge: Grove Books.
4. Craig, C. L. (2005). Psychological type preferences of rural churchgoers. Rural Theology, 3, 123–131.
5. Craig, C. L., Francis, L. J., Bailey, J., & Robbins, M. (2003). Psychological types in Church in Wales congregations. The Psychologist in Wales, 15, 18–21.