Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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