Healy, R. J. (1983). Design For Security Richard J. Healy. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)Healy, Richard J. Design For Security Richard J. Healy. John Wiley & Sons, 1983.
Lua MLA (8ú heag.)Healy, Richard J. Design For Security Richard J. Healy. John Wiley & Sons, 1983.
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