Cita APA (7a ed.)
O'Brien, J. A. (1991). Introduction to information systems in business management (6.vyd.). IRWIN.
Cita Chicago Style (17a ed.)
O'Brien, James A. Introduction to Information Systems in Business Management. 6.vyd. Homewood: IRWIN, 1991.
Cita MLA (9a ed.)
O'Brien, James A. Introduction to Information Systems in Business Management. 6.vyd. IRWIN, 1991.
Precaución: Estas citas no son 100% exactas.