Valacich, Joseph S., 1959- Essentials of systems analysis and design / Joseph S. Valacich, Joey F. George, Jeffrey A. Hoffer. - 3rd ed. - Upper Saddle River, N.J. : Pearson Prentice Hall, c2006. - xxviii, 451 p. : col. ill ; 28 cm. ISBN: 0131854623 (pbk.) LCCN: 2005048853 Subjects--Topical Terms: System design.System analysis. Dewey Class. No.: 004.2/1