Cita APA (7th ed.)

O'Brien, J. A. (1997). Introduction to information systems: Essentials for the Internetworked E-Business Enterprise (8thth ed.). McGraw Hill - Irwin.

Cita Chicago (17th ed.)

O'Brien, James A. Introduction to Information Systems: Essentials for the Internetworked E-Business Enterprise. 8thth ed. Boston: McGraw Hill - Irwin, 1997.

Cita MLA (9th ed.)

O'Brien, James A. Introduction to Information Systems: Essentials for the Internetworked E-Business Enterprise. 8thth ed. McGraw Hill - Irwin, 1997.