Gaya APA

McGuinness, B., Wright, G, H, V. (1995). Ludwig Wittgenstein: Cambridge Letters. Corespondence with Russell, Keynes, Moore, Ramsey and Sraffa . Oxford: Blackwell Publishing.

Gaya MLA

McGuinness, Brian., Wright, Georg, Henrik, Von. "Ludwig Wittgenstein: Cambridge Letters. Corespondence with Russell, Keynes, Moore, Ramsey and Sraffa". Oxford: Blackwell Publishing, 1995. Text.