TY  - GEN
AU  - O'BRIEN,James A,
AU  - George M Marakas
TI  - Introduction to Information Systems
SN  - 978-0-07-304355-5
U1  - 658.4 OBR 
PY  - 2007///
CY  - Boston
PB  - McGraw-Hill Irwin
ER  -