(second edition). USA: Addison–Wesley, Online BookStore (OBS). Retrieved from archives.obs–us.com/obs/english/books/editinc/top.htm (Accessed 30 November, 2006)
The Internet Companion: A Beginner's Guide to Global Networking
(second edition). USA: Addison–Wesley, Online BookStore (OBS). Retrieved from archives.obs–us.com/obs/english/books/editinc/top.htm (Accessed 30 November, 2006)