APA (7th ed.) Citation

O®Brien, J. A., & O'Brien, J. A. (1994). Introduction to information systems (7th ed.). Irwin.

Chicago Style (17th ed.) Citation

O®Brien, James A., and James A. O'Brien. Introduction to Information Systems. 7th ed. Burr Ridge, Ill: Irwin, 1994.

MLA (9th ed.) Citation

O®Brien, James A., and James A. O'Brien. Introduction to Information Systems. 7th ed. Irwin, 1994.