Keller, G. (2005). Statistics for management and economics (7th ed.). Thomson/Brooks/Cole.
Citazione stile Chigago Style (17a edizione)Keller, Gerald. Statistics for Management and Economics. 7th ed. Belmont, Calif: Thomson/Brooks/Cole, 2005.
Citatione MLA (9a ed.)Keller, Gerald. Statistics for Management and Economics. 7th ed. Thomson/Brooks/Cole, 2005.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.