KENDAL, K. E. (2002). Systems analysis and design.Ed. 5. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)KENDAL, Kenneth E. Systems Analysis and Design.Ed. 5. Prentice Hall, 2002.
Lua MLA (8ú heag.)KENDAL, Kenneth E. Systems Analysis and Design.Ed. 5. Prentice Hall, 2002.
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