Παραπομπή APA

Wittgenstein, L. (1997). Philosophical investigations (2 nd ed.). Blackwell.

Παραπομπή Chicago Style

Wittgenstein, Ludwig. Philosophical Investigations. 2 nd ed. United Kingdom: Blackwell, 1997.

Παραπομπή MLA

Wittgenstein, Ludwig. Philosophical Investigations. 2 nd ed. Blackwell, 1997.