O'Brien, J. A. (1991). Introduction to information systems in business management (6.vyd.). IRWIN.
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Citação norma Chicago
O'Brien, James A. Introduction to Information Systems in Business Management. 6.vyd. Homewood: IRWIN, 1991.
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Citação norma MLA
O'Brien, James A. Introduction to Information Systems in Business Management. 6.vyd. IRWIN, 1991.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.