Keller, G., & Warrack, B. (1997). Statistics for management and economics (4th ed.). Duxbury Press.
Citace podle Chicago (17th ed.)Keller, Gerald, a Brian Warrack. Statistics for Management and Economics. 4th ed. Belmont, CA: Duxbury Press, 1997.
Citace podle MLA (9th ed.)Keller, Gerald, a Brian Warrack. Statistics for Management and Economics. 4th ed. Duxbury Press, 1997.
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