Durckheim, K. G. (1989). The call for the masters: The meaning of spiritual guidance on the way to the self. Dutton.
Chicago Style (17. basım) AtıfDurckheim, Karlfried Graf. The Call for the Masters: The Meaning of Spiritual Guidance on the Way to the Self. New York: Dutton, 1989.
MLA (9th ed.) AtıfDurckheim, Karlfried Graf. The Call for the Masters: The Meaning of Spiritual Guidance on the Way to the Self. Dutton, 1989.
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