Ryan, Thomas P.
Statistical methods for quality improvement
Wiley, 1989
 Buku Teks SO
Kume, Hitoshi
Metoda statistik peningkatan mutu = Statistical methods for quality improvement
Mediyatama Sarana Perkasa, 1988
 Buku Teks SO
Cowden, Dudley J.
Statistical methods in quality control
Prentice-Hall, 1957
 Buku Teks SO
Schrock, Edward M.
Quality control and statistical methods
Reinhold, 1961
 Buku Teks SO
Wadsworth, Harrison M.
Modern methods for quality control and improvement
John Wiley & Sons, 2001
 Buku Teks SO