APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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