Mason, Robert D.
Statistical techniques in business and economics
McGraw-Hill , 1999
 Buku Teks
Grangen, Clive William John, 1934-
Forecasting in business and economics
Academic Press, 1989
 Buku Teks
International journal of business insights and transformation
ITM Business School, 2008
 Majalah, Jurnal, Buletin
Atkinson, Brian
Business economics
Addison - Wesley , 1998
 Buku Teks
Harvard Business Review
Harvard Business Review,
 Majalah, Jurnal, Buletin