Keller, G., & Warrack, B. (1997). Statistics for management and economics (4a. ed.). International Thomson.
Tohutoru Kātū Chicago (17th ed.)Keller, Gerald, me Brian Warrack. Statistics for Management and Economics. 4a. ed. Belmont: International Thomson, 1997.
Tohutoro MLA (9th ed.)Keller, Gerald, me Brian Warrack. Statistics for Management and Economics. 4a. ed. International Thomson, 1997.
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