Keeling, S. V. (1968). Descartes (2nd ed.). Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Keeling, Stanley Victor. Descartes. 2nd ed. London: Oxford University Press, 1968.
Lua MLA (9ú heag.)Keeling, Stanley Victor. Descartes. 2nd ed. Oxford University Press, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.