Don Richard Riso, Russ Hudson (1999). “The Wisdom of the Enneagram: The Complete Guide to Psychological and Spiritual Growth for the Nine Personality Types”, Bantam
Don Richard Riso, Russ Hudson (1999). “The Wisdom of the Enneagram: The Complete Guide to Psychological and Spiritual Growth for the Nine Personality Types”, Bantam
Don Richard Riso, Russ Hudson (1999). “The Wisdom of the Enneagram: The Complete Guide to Psychological and Spiritual Growth for the Nine Personality Types”, Bantam