Gaya APA
Pande, P., Holp, L, I.
(2006).
What is six sigma = Berfikir cepat six sigma
.
Yogya:
Andi.
Gaya MLA
Pande, Pete., Holp, Larry, II.
"What is six sigma = Berfikir cepat six sigma".
Yogya:
Andi,
2006.
Text.