Cita APA (7th ed.)
O'Brien, J. A. (2001). Introduction to information systems: Essentials for the Internetworked E-Business Enterprise (10th ed.). McGraw Hill - Irwin.
Cita Chicago (17th ed.)
O'Brien, James A. Introduction to Information Systems: Essentials for the Internetworked E-Business Enterprise. 10th ed. Boston: McGraw Hill - Irwin, 2001.
Cita MLA (9th ed.)
O'Brien, James A. Introduction to Information Systems: Essentials for the Internetworked E-Business Enterprise. 10th ed. McGraw Hill - Irwin, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.