Cita APA (7th ed.)

Welsh, D. J. A. (1989). Codes and cryptography (Repr. with corrections.). Clarendon Press ; Oxford University Press.

Cita Chicago (17th ed.)

Welsh, D. J. A. Codes and Cryptography. Repr. with corrections. Oxford [Oxfordshire] : New York: Clarendon Press ; Oxford University Press, 1989.

Cita MLA (8th ed.)

Welsh, D. J. A. Codes and Cryptography. Repr. with corrections. Clarendon Press ; Oxford University Press, 1989.