Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.