Tohutoro APA (7th ed.)
Malcolm, N., Wright, G. H. :. v., & Wittgenstein, L. (1988). Ludwig Wittgenstein. Bompiani.
Tohutoru Kātū Chicago (17th ed.)
Malcolm, Norman, Georg Henrik : von Wright, me Ludwig Wittgenstein. Ludwig Wittgenstein. Milano: Bompiani, 1988.
Tohutoro MLA (9th ed.)
Malcolm, Norman, et al. Ludwig Wittgenstein. Bompiani, 1988.
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