Wittgenstein, L. (1958). Preliminary studies for the "philosophical investigations", generally known as the blue and brown books (2nd ed.). Oxford: Blackwell.
Παραπομπή Chicago StyleWittgenstein, Ludwig. Preliminary Studies for the "philosophical Investigations", Generally Known As the Blue and Brown Books. 2nd ed. Oxford: Blackwell, 1958.
Παραπομπή MLAWittgenstein, Ludwig. Preliminary Studies for the "philosophical Investigations", Generally Known As the Blue and Brown Books. 2nd ed. Oxford: Blackwell, 1958.
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