Παραπομπή APA
Keller, G., & Warrack, B. (1997). Statistics for management and economics (4th ed.). Belmont: Wadsworth Publishing Company.
Παραπομπή Chicago StyleKeller, Gerald., and Brian Warrack. Statistics for Management and Economics. 4th ed. Belmont: Wadsworth Publishing Company, 1997.
Παραπομπή MLAKeller, Gerald., and Brian Warrack. Statistics for Management and Economics. 4th ed. Belmont: Wadsworth Publishing Company, 1997.
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