Style de citation APA (7e éd.)

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

Style de citation Chicago (17e éd.)

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

Style de citation MLA (9e éd.)

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