APA

Wittgenstein L., . (19681958). Philosophical investigations: the English text of the third edition. New York: Macmillan.

Chicago

Wittgenstein Ludwig, . 19681958. Philosophical investigations: the English text of the third edition. New York: Macmillan.

Harvard

Wittgenstein L., . (19681958). Philosophical investigations: the English text of the third edition. New York: Macmillan.

MLA

Wittgenstein Ludwig, . Philosophical investigations: the English text of the third edition. New York: Macmillan. 19681958.