Cita APA (7a ed.)

Pears, D. F. (1971). Wittgenstein 7. Collins.

Cita Chicago Style (17a ed.)

Pears, David Francis. Wittgenstein 7. London: Collins, 1971.

Cita MLA (9a ed.)

Pears, David Francis. Wittgenstein 7. Collins, 1971.