* Kramer, J. and Alstad D., The Guru Papers: Masks of Authoritarian Power, 1993, ISBN 11-883319-00-5﷧* Lampert, K.(2005); Traditions of Compassion: From Religious Duty to Social Activism.
* Kramer, J. and Alstad D., The Guru Papers: Masks of Authoritarian Power, 1993, ISBN 1-883319-00-5* Lampert, K.(2005); Traditions of Compassion: From Religious Duty to Social Activism.