Awad, E. M. (1979). Systems analysis and design. R. D. Irwin.
Lua i Stíl Chicago (17ú heag.)Awad, Elias M. Systems Analysis and Design. Homewood, Ill: R. D. Irwin, 1979.
Lua MLA (9ú heag.)Awad, Elias M. Systems Analysis and Design. R. D. Irwin, 1979.
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