British Society for the Philosophy of Science. (1950). British Journal for the Philosophy of Science. Aberdeen University Press.
Lua i Stíl Chicago (17ú heag.)British Society for the Philosophy of Science. British Journal for the Philosophy of Science. Aberdeen, Escocia: Aberdeen University Press, 1950.
Lua MLA (8ú heag.)British Society for the Philosophy of Science. British Journal for the Philosophy of Science. Aberdeen University Press, 1950.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.