Schonberger, Richard John
Business Publications, 1985
Buku Teks
Schonberger, Richard John
Business Publications , 1981
Buku Teks
Schonberger, Richard John
N.Y. The Free Press, 1986
Buku Teks
Schonberger, Richard John
Chicago Irwin 1997,
Buku Teks
Yang, Richard
The Forum Press, 1978
Buku Teks