Whitten, J. L. (2008). Introduction to systems analysis & design Jeffrey L. Whitten, Lonnie D.Bentley. s.n.
Lua i Stíl Chicago (17ú heag.)Whitten, Jeffrey L. Introduction to Systems Analysis & Design Jeffrey L. Whitten, Lonnie D.Bentley. s.n, 2008.
Lua MLA (8ú heag.)Whitten, Jeffrey L. Introduction to Systems Analysis & Design Jeffrey L. Whitten, Lonnie D.Bentley. s.n, 2008.
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