Schonberger, Richard John
Free Press, 1982
Buku Teks SO
Todd, Jim
McGraw-Hill Book Company, 1995
Buku Teks SO
Hull, John F.
Gower Press, 1973
Buku Teks SO
Schonberger, Richard John
Prenhallindo, 1997
Buku Teks SO
Compton, W. Dale
Prentice-Hall, 1997
Buku Teks