APA-čujuhus (7. p.)
Keller, G., Bartel, H., & Warrack, B. (1990). Statistics for management and Economics (2nd. ed.). Wadsworth.
Chicago-čujuhus (17. p.)
Keller, Gerald, Henry Bartel, juo Brian Warrack. Statistics for Management and Economics. 2nd. ed. Belmont: Wadsworth, 1990.
MLA-čujuhus (9. p.)
Keller, Gerald, et al. Statistics for Management and Economics. 2nd. ed. Wadsworth, 1990.
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