APA (7th ed.) Citation

Coppel, W. A. (2006). Number theory: An introduction to mathematics. Springer. https://doi.org/10.1007/0-387-29852-5

Chicago Style (17th ed.) Citation

Coppel, W. A. Number Theory: An Introduction to Mathematics. New York, NY: Springer, 2006. https://doi.org/10.1007/0-387-29852-5.

MLA (9th ed.) Citation

Coppel, W. A. Number Theory: An Introduction to Mathematics. Springer, 2006. https://doi.org/10.1007/0-387-29852-5.