Cita APA (7a ed.)
O`Brien, J. A. (1991). Introduction to Information Systems in Business Management (6. ed.). IRWIN.
Cita Chicago Style (17a ed.)
O`Brien, James A. Introduction to Information Systems in Business Management. 6. ed. Homewood: IRWIN, 1991.
Cita MLA (9a ed.)
O`Brien, James A. Introduction to Information Systems in Business Management. 6. ed. IRWIN, 1991.
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