O'Brien, J. A. (1997). Introduction to information systems: Essentials for the Internetworked E-Business Enterprise (8thth ed.). McGraw Hill - Irwin.
Citazione stile Chigago Style (17a edizione)O'Brien, James A. Introduction to Information Systems: Essentials for the Internetworked E-Business Enterprise. 8thth ed. Boston: McGraw Hill - Irwin, 1997.
Citatione MLA (9a ed.)O'Brien, James A. Introduction to Information Systems: Essentials for the Internetworked E-Business Enterprise. 8thth ed. McGraw Hill - Irwin, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.