WILSON J HOLTON. (2002). BUSINESS FORECASTING WITH ACCOMPANYING EXCEL BASED FORECAST XTM SOFTWARE - CD (4TH.). MCGRAW-HILL.
Lua i Stíl Chicago (17ú heag.)WILSON J HOLTON. BUSINESS FORECASTING WITH ACCOMPANYING EXCEL BASED FORECAST XTM SOFTWARE - CD. 4TH. BOSTON: MCGRAW-HILL, 2002.
Lua MLA (9ú heag.)WILSON J HOLTON. BUSINESS FORECASTING WITH ACCOMPANYING EXCEL BASED FORECAST XTM SOFTWARE - CD. 4TH. MCGRAW-HILL, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.