Cita APA (7a ed.)

O®Brien, J. A. (1997). Introduction to information systems (8th ed.). Irwin.

Cita Chicago Style (17a ed.)

O®Brien, James A. Introduction to Information Systems. 8th ed. Chicago: Irwin, 1997.

Cita MLA (9a ed.)

O®Brien, James A. Introduction to Information Systems. 8th ed. Irwin, 1997.