Keller, G., & Warrack, B. (1997). Statistics for management and economics (4a. ed.). International Thomson.
Chicago-čujuhus (17. p.)Keller, Gerald, juo Brian Warrack. Statistics for Management and Economics. 4a. ed. Belmont: International Thomson, 1997.
MLA-čujuhus (9. p.)Keller, Gerald, juo Brian Warrack. Statistics for Management and Economics. 4a. ed. International Thomson, 1997.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.