Gaya APA
Sig Sigma Quality for Business Improvement. (2013).
Yogyakarta:
Graha Ilmu.
Gaya Chicago
Sig Sigma Quality for Business Improvement.
.
Yogyakarta:
Graha Ilmu,
2013.
Buku.
Gaya MLA
Sig Sigma Quality for Business Improvement.
.
Yogyakarta:
Graha Ilmu,
2013.
Buku.
Gaya Turabian
Sig Sigma Quality for Business Improvement.
Yogyakarta:
Graha Ilmu,
2013.
Buku.