MLA

Paar, Christof, Jan Pelzl, and Bart Preneel. Understanding Cryptography. Springer Berlin Heidelberg, 2010.

APA

Paar, C., Pelzl, J., & Preneel, B. (2010). Understanding Cryptography. Springer Berlin Heidelberg.

Chicago

Paar, Christof, Jan Pelzl, and Bart Preneel. Understanding Cryptography. : Springer Berlin Heidelberg, 2010.