Blackham, H. J. (2002). Six existentialist thinkers. Routledge.
Tohutoru Kātū Chicago (17th ed.)Blackham, H. J. Six Existentialist Thinkers. London: Routledge, 2002.
Tohutoro MLA (9th ed.)Blackham, H. J. Six Existentialist Thinkers. Routledge, 2002.
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