APA (7th ed.) Citation

HEY. (2006). The 9 dimensions of the soul: Essence and the enneagram. Winchester, U.K., Washington, U.S.A: O Books, 2006.

Chicago Style (17th ed.) Citation

HEY. The 9 Dimensions of the Soul: Essence and the Enneagram. Winchester, U.K., Washington, U.S.A: Winchester, U.K., Washington, U.S.A: O Books, 2006, 2006.

MLA (8th ed.) Citation

HEY. The 9 Dimensions of the Soul: Essence and the Enneagram. Winchester, U.K., Washington, U.S.A: O Books, 2006, 2006.

Warning: These citations may not always be 100% accurate.