Keller, G. (2018). Statistics for management and economics (Onceava edición.). Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Keller, Gerald. Statistics for Management and Economics. Onceava edición. Boston: Cengage Learning, 2018.
Lua MLA (8ú heag.)Keller, Gerald. Statistics for Management and Economics. Onceava edición. Cengage Learning, 2018.
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