Hanfling, O. (1989). Wittgenstein's later Philosophy. Macmillan.
Lua i Stíl Chicago (17ú heag.)Hanfling, Oswald. Wittgenstein's Later Philosophy. Hampshire ; London: Macmillan, 1989.
Lua MLA (8ú heag.)Hanfling, Oswald. Wittgenstein's Later Philosophy. Macmillan, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.