Keller, G. (2000). Statistics for management and economics (5th ed.). Duxbury/Thomson Learning.
Chicago-referens (17:e uppl.)Keller, Gerald. Statistics for Management and Economics. 5th ed. pacific Grove: Duxbury/Thomson Learning, 2000.
MLA-referens (9:e uppl.)Keller, Gerald. Statistics for Management and Economics. 5th ed. Duxbury/Thomson Learning, 2000.
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