APA (7th ed.) Citation

Koblitz, N. (1987). A Course in Number Theory and Cryptography. Springer US.

Chicago Style (17th ed.) Citation

Koblitz, Neal. A Course in Number Theory and Cryptography. New York, NY: Springer US, 1987.

MLA (9th ed.) Citation

Koblitz, Neal. A Course in Number Theory and Cryptography. Springer US, 1987.