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Nietzsche FW. Thus spoke Zarathustra: a book for everyone and no one [Internet]. Vol. Penguin classics. London: Penguin Books; 1969. Available from: https://ebookcentral.proquest.com/lib/gla/detail.action?docID=6896749
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Sartre JP. Being and nothingness: an essay on phenomenological ontology. London: Methuen; 1957.
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Sartre JP, Mairet P. Existentialism and humanism. London: Methuen; 1948.
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Tillich P. The religious situation. Vol. A living age book. New York: Meridian Books; 1956.
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Tillich P. The courage to be. 3rd edition. New Haven: Yale University Press; 2014.
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Häring B, Deems CF. The Christian existentialist: the philosophy and theology of self-fulfillment in modern society : containing the Deems lectures delivered at New York University in 1966. Vol. The Deems lectures. London: University of London Press; 1969.
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Heinemann FH. Existentialism and the modern predicament. 2nd ed. Black; 1954.
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Joseph F, Reynolds J, Woodward A. The Continuum companion to existentialism. Vol. Continuum companions. London: Continuum; 2011.
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Jaspers K. Philosophical faith and revelation. Vol. Religious perspectives. New York: Harper & Row; 1967.
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Judaken J, Bernasconi R. Situating existentialism: key texts in context. New York: Columbia University Press; 2012.
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Kuhn H. Encounter with nothingness: an essay on existentialism. London: Methuen; 1951.
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Lubac H de. The drama of atheist humanism. San Francisco: Ignatius Press; 1995.
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Macquarrie J. Existentialism. Vol. Theological resources. London: Hutchinson; 1972.
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Macquarrie J. Studies in Christian existentialism: lectures and essays. S.C.M. Press; 1966.
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Pattison G. Anxious angels: a retrospective view of religious existentialism. Basingstoke: Macmillan; 1999.
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Roberts DE. Existentialism and religious belief. New York: Oxford University Press; 1957.
