Wittgenstein, L., & Ogden, C. K. (1983). Letters to C.K. Ogden with comments on the English translation of the Tractatus logico-Philosophicus. Blackwell.
Lua i Stíl Chicago (17ú heag.)Wittgenstein, Ludwig, agus Charles Kay Ogden. Letters to C.K. Ogden with Comments on the English Translation of the Tractatus Logico-Philosophicus. Oxford: Blackwell, 1983.
Lua MLA (9ú heag.)Wittgenstein, Ludwig, agus Charles Kay Ogden. Letters to C.K. Ogden with Comments on the English Translation of the Tractatus Logico-Philosophicus. Blackwell, 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.