Torrey, E.F.1974. Spiritualists and Shamans as Psychotherapists: An Account of Original Anthropological Sin, in (eds. I. Zaretsky and M. P. Leone) Religious Movements in Contemporary America. Princeton , Princeton University Press, pp. 330-337.
2.
Prince, R.H.1982. Shamans and Endorphins: Hypotheses for a Synthesis , Ethos10:409-423.
3.
Barnes, M. and Berke, J.1973. Mary Barnes/Two Accounts of a Journey Through Madness , Harmondsworth, Penguin Books .