Williamson, T. (1996). Knowing and asserting. Duke University Press.
Lua i Stíl Chicago (17ú heag.)Williamson, T. Knowing and Asserting. Duke University Press, 1996.
Lua MLA (9ú heag.)Williamson, T. Knowing and Asserting. Duke University Press, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.