Wilson, J. H. (2007). Business Forecasting With Accompanying Excel-Based ForecastXTM Software Fifth Edition. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Wilson, J. Holton. Business Forecasting With Accompanying Excel-Based ForecastXTM Software Fifth Edition. McGraw-Hill, 2007.
Lua MLA (8ú heag.)Wilson, J. Holton. Business Forecasting With Accompanying Excel-Based ForecastXTM Software Fifth Edition. McGraw-Hill, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.