Cita APA (7a ed.)
Wittgenstein, L. Preliminary Studies for The Philosophical Investigations: Generally Known as The Blue and Brown Books (2a edición.). Basil Blackwell.
Cita estilo Chicago (17a ed.)
Wittgenstein, Ludwig. Preliminary Studies for The Philosophical Investigations: Generally Known as The Blue and Brown Books. 2a edición. Oxford, Inglaterra: Basil Blackwell.
Cita MLA (9a ed.)
Wittgenstein, Ludwig. Preliminary Studies for The Philosophical Investigations: Generally Known as The Blue and Brown Books. 2a edición. Basil Blackwell.
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