Cita APA (7a ed.)
Smith, L. D. (1955). Cryptography: The science of secret writing. Dover Publications.
Cita Chicago Style (17a ed.)
Smith, Laurence Dwight. Cryptography: The Science of Secret Writing. New York: Dover Publications, 1955.
Cita MLA (9a ed.)
Smith, Laurence Dwight. Cryptography: The Science of Secret Writing. Dover Publications, 1955.
Precaución: Estas citas no son 100% exactas.