Pears, D. Wittgenstein.
Lua i Stíl Chicago (17ú heag.)Pears, David. Wittgenstein.
Lua MLA (8ú heag.)Pears, David. Wittgenstein.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)