00555pamaa2200181 4500 0000029946 20111004090000.0 0130183733 004.21 VAL QA76.9.S88 VAL 2001 Valacich Essentials of systems analysis and design Joseph S. Valacich, Joey F. George and Jeffrey A. Hoffer. New Jersey: Prentice Hall, 2001. xxiv, 423p.: ill.col.; 28cm. System design System analysis Hoffer, Jeffrey A. GEOGRE, Joey F.