Gaya APA
EVANS, J, R. (2007).
AN INTRODUCTION TO SIX SIGMA DAN PROCESS IMPROVEMENT PENGANTAR SIX SIGMA .
JAKARTA:
SALEMBA EMPAT.
Gaya MLA
EVANS, JAMES, R.
"AN INTRODUCTION TO SIX SIGMA DAN PROCESS IMPROVEMENT PENGANTAR SIX SIGMA".
JAKARTA:
SALEMBA EMPAT,
2007.
Text.