Vass, I. (1985). Foundations in mathematics. Edward Arnold.
Lua i Stíl Chicago (17ú heag.)Vass, Isobel. Foundations in Mathematics. London: Edward Arnold, 1985.
Lua MLA (9ú heag.)Vass, Isobel. Foundations in Mathematics. Edward Arnold, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.