Citazione Stile APA (7a Edizione)

Wittgenstein, L. (1958). Generally known as the blue and brown books. Harper Torchbooks.

Citazione stile Chigago Style (17a edizione)

Wittgenstein, Ludwig. Generally Known as the Blue and Brown Books. Nueva York: Harper Torchbooks, 1958.

Citatione MLA (9a ed.)

Wittgenstein, Ludwig. Generally Known as the Blue and Brown Books. Harper Torchbooks, 1958.