Seeing Through Your Blind Spots in the Harvard Business Review Blog by Tony Schwartz
The Gifts of the Narrative Tradition by Terry Saracino.
A Guide to the Enneagram and the Nine Types, The Enneagram Worldwide
Instinctual Subtypes by Peter O’Hanrahan
Karen Horney’s Three Trends (Moving Towards, Against, Away From) and the Enneagram Styles by Jerome Wagner
The Enneagram and Object Relations by Beatrice Chestnut
Ego and Essence, by Katy Taylor
The Politics Of Radical Clarity: Helen Palmer And The Enneagram, The Sun Interview
Interview with Sandra Maitri, Interview Transcripts with Andrea Isaacs.
Russ Hudson: The Enneagram: Nine Gateway to Presence, Interview Transcript with Tami Simon