APA (7th ed.) Citation

Cassels, J. W. S. (1965). An introduction to diophantine approximation. Cambridge University Press.

Chicago Style (17th ed.) Citation

Cassels, John William S. An Introduction to Diophantine Approximation. Cambridge: Cambridge University Press, 1965.

MLA (9th ed.) Citation

Cassels, John William S. An Introduction to Diophantine Approximation. Cambridge University Press, 1965.