O'Brien, J. A. (2001). Introduction to information systems: Essentials for the Internetworked E-Business Enterprise (10th ed.). McGraw Hill - Irwin.
Chicago-čujuhus (17. p.)O'Brien, James A. Introduction to Information Systems: Essentials for the Internetworked E-Business Enterprise. 10th ed. Boston: McGraw Hill - Irwin, 2001.
MLA-čujuhus (9. p.)O'Brien, James A. Introduction to Information Systems: Essentials for the Internetworked E-Business Enterprise. 10th ed. McGraw Hill - Irwin, 2001.
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