Gaya APA

Pande, P, S., Holpp, L. (2002). What is Six Sigma, Berpikir Cepat . Yogyakarta: Andi.

Gaya MLA

Pande, Peter, S.., Holpp, Larry. "What is Six Sigma, Berpikir Cepat". Yogyakarta: Andi, 2002. Text.