Bratt, Elmer C.
Business forecasting
McGraw-Hill, 1958
Buku Teks
Hanke, John E.
Business forecasting
Prentice Halls, 2001
Buku Teks
Hanke, Jonh E.
Business forecasting
Pearson Prentice Hall, 2005
Buku Teks
Grangen, Clive William John, 1934-
Forecasting in business and economics
Academic Press, 1989
Buku Teks
Robinson, Colin
Business forecasting : an economic approach
Nelson, 1971
Buku Teks