O'Brien, J. A. (1994). Introduction to information systems (7th ed.). Irwin.
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Dyfyniad Arddull Chicago
O'Brien, James A. Introduction to Information Systems. 7th ed. Burr Ridge, Ill.: Irwin, 1994.
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Dyfyniad MLA
O'Brien, James A. Introduction to Information Systems. 7th ed. Irwin, 1994.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.