Cassels, J. W. S. (1957). An introduction to diophantine approximation. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Cassels, John William Scott. An Introduction to Diophantine Approximation. London: Cambridge University Press, 1957.
Lua MLA (9ú heag.)Cassels, John William Scott. An Introduction to Diophantine Approximation. Cambridge University Press, 1957.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.