APA (7th ed.) Citation

Cassels, J. W. S. (1957). An introduction to diophantine approximation. Univ. Press.

Chicago Style (17th ed.) Citation

Cassels, John W. S. An Introduction to Diophantine Approximation. Cambridge: Univ. Press, 1957.

MLA (9th ed.) Citation

Cassels, John W. S. An Introduction to Diophantine Approximation. Univ. Press, 1957.