Keller, G. (2007). Statistics for management and economics: Abbrviated. Mason, OH: Thomson/South-Western.
Trích dẫn kiểu ChicagoKeller, Gerald. Statistics for Management and Economics: Abbrviated. Mason, OH: Thomson/South-Western, 2007.
Trích dẫn MLAKeller, Gerald. Statistics for Management and Economics: Abbrviated. Mason, OH: Thomson/South-Western, 2007.
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