APA (7th ed.) Citation

Koblitz, N. (1994). A course in number theory and cryptography (2nd ed.). Springer.

Chicago Style (17th ed.) Citation

Koblitz, Neal. A Course in Number Theory and Cryptography. 2nd ed. New York: Springer, 1994.

MLA (9th ed.) Citation

Koblitz, Neal. A Course in Number Theory and Cryptography. 2nd ed. Springer, 1994.