Gaya APA
Tang, L, C. et al (2006).
Six sigma Advanced Tools for Black Belts and Master Black Belts E-BOOK .
England:
John Wiley & Sons Ltd.
Gaya MLA
Tang, Loon, Ching. et al.
"Six sigma Advanced Tools for Black Belts and Master Black Belts E-BOOK".
England:
John Wiley & Sons Ltd,
2006.
Text.