Philosophical investigations
MLA
Wittgenstein, Ludwig. Philosophical Investigations. Oxford: Basil Blackwell, 1958.
APA
Wittgenstein, L. (1958). Philosophical investigations. Oxford: Basil Blackwell.
Chicago
Wittgenstein, Ludwig, and G.E.M Anscombe. Philosophical Investigations. Oxford: Basil Blackwell, 1958.