Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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