APA (7th ed.) Citation

Welsh, D. J. A. (1989). Codes and cryptography (Repr. (with corr.).). Clarendon.

Chicago Style (17th ed.) Citation

Welsh, Dominic J. A. Codes and Cryptography. Repr. (with corr.). Oxford: Clarendon, 1989.

MLA (9th ed.) Citation

Welsh, Dominic J. A. Codes and Cryptography. Repr. (with corr.). Clarendon, 1989.