O'Brien, J. A. (1988). Information systems in business management: With software and BASIC tutorials (5th ed.). Irwin.
Citace podle Chicago (17th ed.)O'Brien, James A. Information Systems in Business Management: With Software and BASIC Tutorials. 5th ed. Homewood, Ill: Irwin, 1988.
Citace podle MLA (9th ed.)O'Brien, James A. Information Systems in Business Management: With Software and BASIC Tutorials. 5th ed. Irwin, 1988.
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