Whitten, J. L. (1998). Systems Analysis And Design Methods Jeffrey L. Whitten, Lonnie D. Bentley. Irwin.
Lua i Stíl Chicago (17ú heag.)Whitten, Jeffrey L. Systems Analysis And Design Methods Jeffrey L. Whitten, Lonnie D. Bentley. Irwin, 1998.
Lua MLA (8ú heag.)Whitten, Jeffrey L. Systems Analysis And Design Methods Jeffrey L. Whitten, Lonnie D. Bentley. Irwin, 1998.
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