Knowles Graeme & bookboon.com. Six Sigma.
Chicago-čujuhus (17. p.)Knowles Graeme juo bookboon.com. Six Sigma.
MLA-čujuhus (9. p.)Knowles Graeme juo bookboon.com. Six Sigma.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.