APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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