Levenbach, Hans, author
Lifetime Learning Publications, 1981
Buku Teks
Makridakis, Spyros G., author
John Wiley & Sons, 1989
Buku Teks
Wheelwright, Steven C., author
John Wiley & Sons, 1985
Buku Teks
Wheelwright, Steven C., author
John Wiley & Sons, 1973
Buku Teks
Lancaster, Geoffrey A.
Macmillan, 1985
Buku Teks