Cita APA (7a ed.)

Black, M. (1964). A companion to Wittgenstein s tractatus. Cambridge.

Cita Chicago Style (17a ed.)

Black, Max. A Companion to Wittgenstein S Tractatus. Cambridge: Cambridge, 1964.

Cita MLA (8a ed.)

Black, Max. A Companion to Wittgenstein S Tractatus. Cambridge, 1964.