Não informado. (1940). Annals of Mathematics Studies. Princeton University Press.
Lua i Stíl Chicago (17ú heag.)Não informado. Annals of Mathematics Studies. Princeton, NJ: Princeton University Press, 1940.
Lua MLA (8ú heag.)Não informado. Annals of Mathematics Studies. Princeton University Press, 1940.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.