Keller, G., & Warrack, B. (2003). Statistics for management and economics (6th ed.). Thomson/Brooks/Cole.
Citazione stile Chigago Style (17a edizione)Keller, Gerald, e Brian Warrack. Statistics for Management and Economics. 6th ed. Pacific Grove, CA: Thomson/Brooks/Cole, 2003.
Citatione MLA (9a ed.)Keller, Gerald, e Brian Warrack. Statistics for Management and Economics. 6th ed. Thomson/Brooks/Cole, 2003.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.