Shelly, G. B. (2005). Discovering computers 2006: A gateway to information. Thomson/Course Technology.
Lua i Stíl Chicago (17ú heag.)Shelly, Gary B. Discovering Computers 2006: A Gateway to Information. Australia: Thomson/Course Technology, 2005.
Lua MLA (8ú heag.)Shelly, Gary B. Discovering Computers 2006: A Gateway to Information. Thomson/Course Technology, 2005.
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