Kenny, A. (1973). Wittgenstein. Penguin Books.
Cita Chicago (17th ed.)Kenny, Anthony. Wittgenstein. Harmondsworth: Penguin Books, 1973.
Cita MLA (9th ed.)Kenny, Anthony. Wittgenstein. Penguin Books, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.