APA цитиране

Wittgenstein, L. (1965). Preliminary studies for the 'Philosophical investigations': Generally known as the Blue and Brown books. New York: Harper & Row.

Чикагска система за цитиране

Wittgenstein, Ludwig. Preliminary Studies for the 'Philosophical Investigations': Generally Known As the Blue and Brown Books. New York: Harper & Row, 1965.

MLA формат за цитиране

Wittgenstein, Ludwig. Preliminary Studies for the 'Philosophical Investigations': Generally Known As the Blue and Brown Books. New York: Harper & Row, 1965.

Внимание: Тези цитати може да не са 100% точни.