Citazione Stile APA (7a Edizione)

Wittgenstein, L. (1958). Preliminary studies for the 'Philosophical investigations': Generally known as the Blue and Brown books ([2nd ed.].). Harper Torchbooks.

Citazione stile Chigago Style (17a edizione)

Wittgenstein, Ludwig. Preliminary Studies for the 'Philosophical Investigations': Generally Known as the Blue and Brown Books. [2nd ed.]. New York: Harper Torchbooks, 1958.

Citatione MLA (9a ed.)

Wittgenstein, Ludwig. Preliminary Studies for the 'Philosophical Investigations': Generally Known as the Blue and Brown Books. [2nd ed.]. Harper Torchbooks, 1958.