Whitten, J. L. (2004). Systems analysis and design methods[ada CD]. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Whitten, Jeffrey L. Systems Analysis and Design Methods[ada CD]. McGraw-Hill, 2004.
Lua MLA (8ú heag.)Whitten, Jeffrey L. Systems Analysis and Design Methods[ada CD]. McGraw-Hill, 2004.
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