Steiner, R. (1975). A road to self-knowledge : and, The threshold of the spiritual world / translated [from the German] by H. Collison, and revised by M. Cotterell: And, The threshold of the spiritual world (3rd ed.). Rudolf Steiner Press.
Chicago Edition CitationSteiner, Rudolf. A Road to Self-knowledge : And, The Threshold of the Spiritual World / Translated [from the German] by H. Collison, and Revised by M. Cotterell: And, The Threshold of the Spiritual World. 3rd ed. London: Rudolf Steiner Press, 1975.
MLA Edition CitationSteiner, Rudolf. A Road to Self-knowledge : And, The Threshold of the Spiritual World / Translated [from the German] by H. Collison, and Revised by M. Cotterell: And, The Threshold of the Spiritual World. 3rd ed. Rudolf Steiner Press, 1975.