Fogelin, R. J. (2002). Wittgenstein. Routledge.
Tohutoru Kātū Chicago (17th ed.)Fogelin, Robert J. Wittgenstein. London ; New York: Routledge, 2002.
Tohutoro MLA (9th ed.)Fogelin, Robert J. Wittgenstein. Routledge, 2002.
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