Keller, G., Bartel, H., & Warrack, B. (1988). Statistics for management and economics: A systematic approach. Wadsworth Pub. Co.
Chicago-viite (17. p.)Keller, Gerald, Henry Bartel, ja Brian Warrack. Statistics for Management and Economics: A Systematic Approach. Belmont, Calif: Wadsworth Pub. Co, 1988.
MLA-viite (9. p.)Keller, Gerald, et al. Statistics for Management and Economics: A Systematic Approach. Wadsworth Pub. Co, 1988.
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