Black, M. (1964). A companion to Wittgenstein's Tractatus. Cornell University Press.
Cita Chicago (17th ed.)Black, Max. A Companion to Wittgenstein's Tractatus. Ithaca, N.Y: Cornell University Press, 1964.
Cita MLA (9th ed.)Black, Max. A Companion to Wittgenstein's Tractatus. Cornell University Press, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.