Riso, D. R., & Hudson, R. (1999). The wisdom of the enneagram: The complete guide to psychological and spiritual growth for the nine personality types. Bantam Books.
Style de citation Chicago (17e éd.)Riso, Don Richard, et Russ Hudson. The Wisdom of the Enneagram: The Complete Guide to Psychological and Spiritual Growth for the Nine Personality Types. New York: Bantam Books, 1999.
Style de citation MLA (8e éd.)Riso, Don Richard, et Russ Hudson. The Wisdom of the Enneagram: The Complete Guide to Psychological and Spiritual Growth for the Nine Personality Types. Bantam Books, 1999.
Attention : ces citations peuvent ne pas être correctes à 100%.