Davis, W. S. (1997). Computers and information systems: An introduction. West Pub.
Lua i Stíl Chicago (17ú heag.)Davis, William S. Computers and Information Systems: An Introduction. Minneapolis: West Pub, 1997.
Lua MLA (9ú heag.)Davis, William S. Computers and Information Systems: An Introduction. West Pub, 1997.
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