American Psychological Association
Ebert, Andreas, & Kustenmacher, Marion, & Heinegg, Peter (Eds.). ( 1995 ). Experiencing the Enneagram ( 00 ed. ). Crossroad Publishing Company.
Modern Language Association
Ebert, Andreas and Kustenmacher, Marion and Heinegg, Peter. Experiencing the Enneagram . Crossroad Publishing Company. 1995
Chicago Citation
Ebert, Andreas and Kustenmacher, Marion and Heinegg, Peter. Experiencing the Enneagram . 00 .New York
: Crossroad Publishing Company, 1995.
American Medical Association
Ebert, Andreas and Kustenmacher, Marion and Heinegg, Peter. Experiencing the Enneagram . Crossroad Publishing Company; 1995.