APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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