Cita APA (7a ed.)
Wittgenstein, L., Anscombe, G., & Wright, G. H. v. Zettel. Basil Blackwell.
Cita estilo Chicago (17a ed.)
Wittgenstein, Ludwig, G.E.M Anscombe, y Georg Henrik von Wright. Zettel. Oxford, Inglaterra: Basil Blackwell.
Cita MLA (9a ed.)
Wittgenstein, Ludwig, et al. Zettel. Basil Blackwell.
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