U.S. Environmental Protection Agency. The environmental professional<U+0092>s guide to lean & six sigma.
Chicago-čujuhus (17. p.)U.S. Environmental Protection Agency. The Environmental Professional<U+0092>s Guide to Lean & Six Sigma.
MLA-čujuhus (9. p.)U.S. Environmental Protection Agency. The Environmental Professional<U+0092>s Guide to Lean & Six Sigma.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.