Cita APA (7a ed.)

Copi, I. M., & Beard, R. W. (1966). Essays on Wittgenstein's Tractatus. Routledge & Kegan Paul.

Cita Chicago Style (17a ed.)

Copi, Irving M., y Robert W. Beard. Essays on Wittgenstein's Tractatus. London: Routledge & Kegan Paul, 1966.

Cita MLA (9a ed.)

Copi, Irving M., y Robert W. Beard. Essays on Wittgenstein's Tractatus. Routledge & Kegan Paul, 1966.