Levenbach, Hans
Lifetime Learning Publications, 1981
Buku Teks
Grangen, Clive William John, 1934-
Academic Press, 1989
Buku Teks
Wheelwright, Steven C.
John Wiley & Sons, 1973
Buku Teks
Makridakis, Spyros G.
John Wiley & Sons, 1989
Buku Teks
Wheelwright, Steven C.
John Wiley & Sons, 1985
Buku Teks