Cita APA (7th ed.)
Whitten, J. L. (1994). Systems analysis & design methods (3rd.ed.). Irwin.
Cita Chicago (17th ed.)
Whitten, Jeffrey L. Systems Analysis & Design Methods. 3rd.ed. Burr Ridge: Irwin, 1994.
Cita MLA (9th ed.)
Whitten, Jeffrey L. Systems Analysis & Design Methods. 3rd.ed. Irwin, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.