1. Burns, J., Francis, L. J., Village, A., & Robbins, M. (2013). Psychological type profile of Roman Catholic priests: an empirical enquiry in the United States. Pastoral Psychology, 62, 239–246.
2. Burton, L., Francis, L. J., & Robbins, M. (2010). Psychological type profile of Methodist circuit ministers in Britain: similarities with and differences from Anglican clergy. Journal of Empirical Theology, 23, 64–81.
3. Cabral, G. (1984). Psychological types in a Catholic convent: applications to community living and congregational data. Journal of Psychological Type, 8, 16–22.
4. Cardwell, S. W. (1967). The MMPI as a predictor of success among seminary students. Ministry Studies, 1, 3–20.
5. Cattell, R. B., Eber, H. W., & Tatsuoka, M. M. (1970). Handbook for the sixteen personality factor questionnaire (16PF). Champaign: Institute for Personality and Ability Testing.