Hanke, John E.
Business forecasting
Pearson - Prentice Hall, 2009
 Buku Teks
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
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