APA (7th ed.) Citation

Klima, R. E., & Sigmon, N. P. (2019). Cryptology: Classical and modern (second edition.). Taylor & Francis.

Chicago Style (17th ed.) Citation

Klima, Richard E., and Neil P. Sigmon. Cryptology: Classical and Modern. second edition. Boca Raton ; London ; New York: Taylor & Francis, 2019.

MLA (9th ed.) Citation

Klima, Richard E., and Neil P. Sigmon. Cryptology: Classical and Modern. second edition. Taylor & Francis, 2019.