Lua APA (7ú heag.)
Welsh,Dominic. (1988). Codes and cryptography. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)
Welsh,Dominic. Codes and Cryptography. New York: Oxford University Press, 1988.
Lua MLA (9ú heag.)
Welsh,Dominic. Codes and Cryptography. Oxford University Press, 1988.
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