Cita APA (7th ed.)
Welsh,Dominic. (1988). Codes and cryptography. Oxford University Press.
Cita Chicago (17th ed.)
Welsh,Dominic. Codes and Cryptography. New York: Oxford University Press, 1988.
Cita MLA (9th ed.)
Welsh,Dominic. Codes and Cryptography. Oxford University Press, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.