Citazione Stile APA (7a Edizione)

Smith, L. D. (1971). Cryptography: The science of secret writing. Dover Publications.

Citazione stile Chigago Style (17a edizione)

Smith, Laurence Dwight. Cryptography: The Science of Secret Writing. New York: Dover Publications, 1971.

Citatione MLA (9a ed.)

Smith, Laurence Dwight. Cryptography: The Science of Secret Writing. Dover Publications, 1971.