Watson, & Billingsley. (1999). Statistics for management and economics. Pacific Grove; London: Duxbury Press.
Παραπομπή Chicago StyleWatson, και Billingsley. Statistics for Management and Economics. Pacific Grove; London: Duxbury Press, 1999.
Παραπομπή MLAWatson, και Billingsley. Statistics for Management and Economics. Pacific Grove; London: Duxbury Press, 1999.
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