aly, e. m., & tawfekm mohamed hassan ; supervisor. (2008). application of six sigma. {l.n}.
Chicago-čujuhus (17. p.)aly, essam mohamoud, juo tawfekm mohamed hassan ; supervisor. Application of Six Sigma. cairo: {l.n}, 2008.
MLA-čujuhus (9. p.)aly, essam mohamoud, juo tawfekm mohamed hassan ; supervisor. Application of Six Sigma. {l.n}, 2008.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.