Luckhardt, C. G. (1979). Wittgenstein: Sources and perspectives. The Harvester.
Cita Chicago (17th ed.)Luckhardt, C. G. Wittgenstein: Sources and Perspectives. The Harvester, 1979.
Cita MLA (9th ed.)Luckhardt, C. G. Wittgenstein: Sources and Perspectives. The Harvester, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.