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OBRIEN J. A., . (2007). MANAGEMET INFORMATION SYSTEM. NEW YORK: SANFRANSISICO.
OBRIEN JAMES A, . 2007. MANAGEMET INFORMATION SYSTEM. NEW YORK: SANFRANSISICO.
OBRIEN JAMES A, . MANAGEMET INFORMATION SYSTEM. NEW YORK: SANFRANSISICO. 2007.