Cita APA (7a ed.)

Pears, D. F. (1988). Wittgenstein (9th impression.). Fontana.

Cita Chicago Style (17a ed.)

Pears, David Francis. Wittgenstein. 9th impression. London: Fontana, 1988.

Cita MLA (9a ed.)

Pears, David Francis. Wittgenstein. 9th impression. Fontana, 1988.