Valacich, Joseph S., 1959- Essentials of systems analysis and design / Joseph S. Valacich, Joey F. George, Jeffrey A. Hoffer. - 2nd ed., International ed. - Upper Saddle River, N.J. : Pearson Prentice Hall, 2004. - xxvii, 460 p. : col. ill ; 28 cm. Includes bibliographical references and index. ISBN: 0131211927 Subjects--Topical Terms: System design.System analysis. Dewey Class. No.: 004.21