O'Leary, D. E. (2000). Enterprise resource planning systems: Systems, life cycle, electronic commerce and risk. Cambridge University press.
Dyfyniad Arddull ChicagoO'Leary, Daniel E. Enterprise Resource Planning Systems: Systems, Life Cycle, Electronic Commerce and Risk. Cambridge: Cambridge University press, 2000.
Dyfyniad MLAO'Leary, Daniel E. Enterprise Resource Planning Systems: Systems, Life Cycle, Electronic Commerce and Risk. Cambridge University press, 2000.
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