Pyzdek, Thomas
The Six sigma handbook : a complete guide for green belts, black belts, and managers at all levels
McGraw-Hill, 2003
Buku Referensi
Grant, Eugene Lodewick
Statistical quality control
McGraw-Hill, 1988
Buku Teks
Pond, Robert J.
Fundamentals of statistical quality control
Maxwell Macmillan, 1994
Buku Teks
Grant, Eugene Lodewick
Statistical quality control
McGraw-Hill, 1980
Buku Teks
Wadsworth, Harrison M.
Modern methods for quality control and improvement
John Wiley & Sons, 2001
Buku Teks