References
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- Guardini, R. (1998 [1956]). The end of the modern World. Wilmington, Delaware: ISI Books.
- McGrath, A. (2008). Christianity's dangerous idea: The protestant revolution - a history from the sixteenth century to the twenty-first. New York: HarperOne.
- Tacey, D. (2001). Jung and the new age. Hove and New York: Brunner-Routledge.