Bell, D. E., & Schleifer, A. (1995). Risk management. Cambridge, MA.: Course Technology.
Dyfyniad Arddull ChicagoBell, David E., và Arthur Schleifer. Risk Management. Cambridge, MA.: Course Technology, 1995.
Dyfyniad MLABell, David E., và Arthur Schleifer. Risk Management. Cambridge, MA.: Course Technology, 1995.
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