Cita APA (7th ed.)

O'Brien, J. A. (1991). Introduction to information systems in business management (Sixth edition.). Irwin.

Cita Chicago (17th ed.)

O'Brien, James A. Introduction to Information Systems in Business Management. Sixth edition. Homewood, Ill: Irwin, 1991.

Cita MLA (9th ed.)

O'Brien, James A. Introduction to Information Systems in Business Management. Sixth edition. Irwin, 1991.