Hornby, Win
Business economics
Prentice-Hall, 2001
 Buku Teks
Maisal, Sherman J.
Fluctuations, growth, and forecasting : the principles of dynamic business economics
John Wiley & Sons, 1957
 Buku Teks
Hanke, John E.
Business forecasting
Pearson - Prentice Hall, 2009
 Buku Teks SO
Bratt, Elmer C.
Business forecasting
McGraw-Hill, 1958
 Buku Teks
Hanke, Jonh E.
Business forecasting
Pearson Prentice Hall, 2005
 Buku Teks SO