További olvasmányok

Magyar nyelven

Angolul

  • Almaas, A. H. (2000). Facets of Unity: The Enneagram of Holy Ideas. Shambhala. ISBN 0-936713-14-3.
  • Ichazo, Oscar (1982). Interviews with Oscar Ichazo. Arica Press. ISBN 0-916554-02-3.
  • Maitri, Sandra (2005). The Enneagram of Passions and Virtues: Finding the Way Home. Tarcher. ISBN 1-58542-406-4.
  • Naranjo, Claudio (1997). Transformation Through Insight: Enneatypes in Life. Hohm Press. ISBN 0-934252-73-4.
  • Naranjo, Claudio (1994). Character and Neurosis: An Integrative View. Gateways/IDHHB, Inc. ISBN 0-89556-066-6.
  • Palmer, Helen (1991). The Enneagram: Understanding Yourself and Others in Your Life. HarperSanFrancisco. ISBN 0-06-250683-8.
  • Wagele, Elizabeth; Ingrid Stabb (2010). The Career Within You. HarperOne. ISBN 978-0-06-171861-8.
  • Riso, Don Richard; Hudson, Russ (2000). Understanding the Enneagram; the practical guide to personality types. Houghton Mifflin Company. ISBN 0-618-00415-7.
  • Fauvre, Katherine Chernick (1995). Enneagram Instinctual Subtypes. Enneagram Explorations. ISBN 978-1-930054-00-4.
  • Fauvre, Katherine Chernick, David W. Fauvre (2010). The 27 Tritypes Revealed: Discover Your Life Purpose and Blind Spot. Enneagram Explorations. ISBN 978-1-930054-18-9.