APA-Zitierstil (7. Ausg.)

Wittgenstein, L. (1969). Preliminary studies for the 'Philosophical investigations' generally known as The blue and brown books (2. ed.). Blackwell.

Chicago-Zitierstil (17. Ausg.)

Wittgenstein, Ludwig. Preliminary Studies for the 'Philosophical Investigations' Generally Known as The Blue and Brown Books. 2. ed. Oxford: Blackwell, 1969.

MLA-Zitierstil (9. Ausg.)

Wittgenstein, Ludwig. Preliminary Studies for the 'Philosophical Investigations' Generally Known as The Blue and Brown Books. 2. ed. Blackwell, 1969.