APA (7th ed.) Citation

Sotillos, S. B. The Enneagram’s Science of the Soul. Society for Spirituality Studies.

Chicago Style (17th ed.) Citation

Sotillos, Samuel Bendeck. The Enneagram’s Science of the Soul. Society for Spirituality Studies.

MLA (9th ed.) Citation

Sotillos, Samuel Bendeck. The Enneagram’s Science of the Soul. Society for Spirituality Studies.

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