Gaya APA
Syukron, A., Kholil, M. (2013).
Six Sigma Quality For Business Improvement (Ed.1, Cet.1).
Yogyakarta:
Graha Ilmu.
Gaya MLA
Syukron, Amin., Kholil, Muhammad.
"Six Sigma Quality For Business Improvement".
Ed.1, Cet.1
Yogyakarta:
Graha Ilmu,
2013.
Textbook.