Cita APA (7a ed.)

Black, M. (1964). A companion to Wittgenstein's Tractatus. University Press.

Cita Chicago Style (17a ed.)

Black, Max. A Companion to Wittgenstein's Tractatus. Cambridge: University Press, 1964.

Cita MLA (9a ed.)

Black, Max. A Companion to Wittgenstein's Tractatus. University Press, 1964.