Cita APA (7th ed.)
Piper, F., & Murphy, S. Cryptography: A Very Short Introduction. Oxford University.
Cita Chicago (17th ed.)
Piper, Fred, i Sean Murphy. Cryptography: A Very Short Introduction. Nueva York, EUA: Oxford University.
Cita MLA (9th ed.)
Piper, Fred, i Sean Murphy. Cryptography: A Very Short Introduction. Oxford University.
Atenció: Aquestes cites poden no estar 100% correctes.