APA (7th ed.) Citation

WITTGENSTEIN, L. (1967). Philosophical investigations (3rd ed.). Blackwell.

Chicago Style (17th ed.) Citation

WITTGENSTEIN, Ludwig. Philosophical Investigations. 3rd ed. Oxford: Blackwell, 1967.

MLA (9th ed.) Citation

WITTGENSTEIN, Ludwig. Philosophical Investigations. 3rd ed. Blackwell, 1967.