Irwin, D. (1999). On target: Achieving best business performance. London: International Thomson Business Press.
Dyfyniad Arddull ChicagoIrwin, David. On Target: Achieving Best Business Performance. London: International Thomson Business Press, 1999.
Dyfyniad MLAIrwin, David. On Target: Achieving Best Business Performance. London: International Thomson Business Press, 1999.
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