Benner, D. G. (2012) Spirituality and the Awakening Self: The Sacred Journey of Transformation. Grand Rapids, MI: Brazos Press.
Fowler, J. W. (1995) Stages of Faith: The Psychology of Human Development and the Quest for Meaning. New York: HarperOne.
Innes, R. (1996) Personality Indicators and the Spiritual Life. Cambridge: Grove Books (Grove Spirituality Series, 57).
Watts, F. and Williams, M. (1988) The Psychology of Religious Knowing. Cambridge: Cambridge University Press.
The Enneagram and Spirituality
Bergin, É. and Fitzgerald, E. (1993) An Enneagram Guide: A Spirituality of Love in Brokenness. Dublin: SDB Media.
Metz, B. and Burchill, J. (1987) The Enneagram and Prayer: Discovering Our True Selves before God. Denville, NJ: Dimension Books.
Pierse, G. (1995) Nine Prayer Spaces: The Enneagram and Christian Meditation. 2nd edn. Quezon City: Claretian Publications.
Riso, D. R. (1993) Enneagram Transformations: Releases and Affirmations for Healing Your Personality Type. Boston: Houghton Mifflin.
Riso, D. R. and Hudson, R. (1996) Personality Types: Using the Enneagram for Self-Discovery. Rev. edn. Boston: Houghton Mifflin.
Riso, D. R. and Hudson, R. (1999) The Wisdom of the Enneagram: The Complete Guide to Psychological and Spiritual Growth for the Nine Personality Types. New York: Bantam.
Riso, D. R. and Hudson, R. (2000) Understanding the Enneagram: The Practical Guide to Personality Types. Rev. edn. Boston: Houghton Mifflin.
Riso, D. R. and Hudson, R. (2003) Discovering Your Personality Type: The Essential Introduction to the Enneagram. Rev. edn. Boston: Houghton Mifflin.
Rohr, R. and Ebert, A. (2001) The Enneagram: A Christian Perspective. Translated by P. Heinegg. New York: Crossroad.
Zuercher, S. (1992) Enneagram Spirituality: From Compulsion to Contemplation. Notre Dame, IN: Ave Maria Press.
Zuercher, S. (2008) Using the Enneagram in Prayer: A Contemplative Guide. Notre Dame, IN: Ave Maria Press.
Myers-Briggs Type Indicator and Spirituality
Duncan, B. (1993) Pray Your Way: Your Personality and God. London: Darton, Longman and Todd.
Goldsmith, M. (1994) Knowing Me – Knowing God: Exploring Your Spirituality with Myers-Briggs. London: Triangle.
Goldsmith, M. and Wharton, M. (1993) ‘Type and Spirituality’, in Goldsmith, M. and Wharton, M. Knowing Me – Knowing You: Exploring Personality Type and Temperament. London: SPCK, pp. 156-181.
Hirsh, S. K. and Kise, J. A. G. (2006) Soul Types: Matching Your Personality and Spiritual Path. Minneapolis: Augsburg.
McGuinness, J. (2009) Growing Spiritually with the Myers-Briggs Model. London: SPCK.