Luckhardt, C. G. (1979). Wittgenstein: Sources and perspectives. The Harvester.
Tohutoru Kātū Chicago (17th ed.)Luckhardt, C. G. Wittgenstein: Sources and Perspectives. The Harvester, 1979.
Tohutoro MLA (9th ed.)Luckhardt, C. G. Wittgenstein: Sources and Perspectives. The Harvester, 1979.
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