Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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