harry, m. (2000). Six sigma: The breakthrough management strategy.
Chicago-čujuhus (17. p.)harry, mikel. Six Sigma: The Breakthrough Management Strategy. New York, 2000.
MLA-čujuhus (9. p.)harry, mikel. Six Sigma: The Breakthrough Management Strategy. 2000.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.