APA Style
Syukron, A., Kholil, M. (2013).
Six Sigma Quality for Business Improvement (Edisi Pertama).
Yogyakarta:
Graha Ilmu.
MLA Style
Syukron, Amin., Kholil, Muhammad.
"Six Sigma Quality for Business Improvement".
Edisi Pertama
Yogyakarta:
Graha Ilmu,
2013.
Text.