Cita APA (7a ed.)

Copi, I. M., & Beard, R. W. (2007). Essays on Wittgenstein's Tractatus. Routledge.

Cita Chicago Style (17a ed.)

Copi, Irving M., y Robert W. Beard. Essays on Wittgenstein's Tractatus. Oxfordshire, England: Routledge, 2007.

Cita MLA (9a ed.)

Copi, Irving M., y Robert W. Beard. Essays on Wittgenstein's Tractatus. Routledge, 2007.