Chadwick, D. W. (1996). Understanding X.500: The directory. International Thomson Computer Press.
Lua i Stíl Chicago (17ú heag.)Chadwick, D. W. Understanding X.500: The Directory. London: International Thomson Computer Press, 1996.
Lua MLA (9ú heag.)Chadwick, D. W. Understanding X.500: The Directory. International Thomson Computer Press, 1996.
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