Gupta, Praveen
The six sigma performance handbook/Praveen Gupta
MCGraw-Hill, 2004
 Buku Teks
Pyzdek, Thomas, author
The Six Sigma Handbook : Revised and Expanded / Thomas Pyzdek
McGraw-Hill, 2003
 Buku Teks
Cano, Emilio L., author
Six sigma with R : statistical engineering for process improvement
[Springer Science, ], 2012
 eBooks
Tinjauan umum six sigma (6 0)
 Artikel Jurnal
Antony, Jiju, author
The Ten Commandments of Lean Six Sigma: A Guide for Practitioners
Emerald Publishing Limited, 2019
 eBooks