Cita APA (7a ed.)

O'Brien, J. A. (2003). Introduction to information systems: Essentials for the e-business enterprise (11th ed.). McGraw-Hill/Irwin.

Cita Chicago Style (17a ed.)

O'Brien, James A. Introduction to Information Systems: Essentials for the E-business Enterprise. 11th ed. New York: McGraw-Hill/Irwin, 2003.

Cita MLA (9a ed.)

O'Brien, James A. Introduction to Information Systems: Essentials for the E-business Enterprise. 11th ed. McGraw-Hill/Irwin, 2003.