Cita APA (7th ed.)

O'Brien, J. A. (1991). Introduction to information systems in business management (6th ed.). Irwin.

Cita Chicago (17th ed.)

O'Brien, James A. Introduction to Information Systems in Business Management. 6th ed. Homewood, Ill: Irwin, 1991.

Cita MLA (9th ed.)

O'Brien, James A. Introduction to Information Systems in Business Management. 6th ed. Irwin, 1991.