Harry, M. (1997). Information systems in business (2nd ed.). Pitman Pub.
Chicago-viite (17. p.)Harry, M.J.S. Information Systems in Business. 2nd ed. London: Pitman Pub, 1997.
MLA-viite (9. p.)Harry, M.J.S. Information Systems in Business. 2nd ed. Pitman Pub, 1997.
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