OʼBrien, J. A. (1999). Management information systems: Managing information technology in the internetworked enterprise (4th ed.). Irwin/McGraw-Hill ; Galgotia Publications.

OʼBrien, James A. Management Information Systems: Managing Information Technology in the Internetworked Enterprise. 4th ed. Boston : New Delhi: Irwin/McGraw-Hill ; Galgotia Publications, 1999.

OʼBrien, James A. Management Information Systems: Managing Information Technology in the Internetworked Enterprise. 4th ed. Irwin/McGraw-Hill ; Galgotia Publications, 1999.