Schonberger, Richard John
N.Y. The Free Press, 1986
Buku Teks
Hull, John F.
Gower Press, 1973
Buku Teks
Schonberger, Richard John
Prenhallindo , 1997
Buku Teks
Schonberger, Richard John
Business Publications, 1985
Buku Teks
Schonberger, Richard John
Business Publications , 1981
Buku Teks