Graff, J. C. (2001). Cryptography and E-Commerce. Wiley.
Chicago Style (17th ed.) ZitazioaGraff, Jon C. Cryptography and E-Commerce. New York: Wiley, 2001.
MLA (9th ed.) ZitazioaGraff, Jon C. Cryptography and E-Commerce. Wiley, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.