DEWHURST R F. (1972). BUSINESS COST BENEFIT ANALYSIS. MCGRAW-HILL.
Lua i Stíl Chicago (17ú heag.)DEWHURST R F. BUSINESS COST BENEFIT ANALYSIS. LONDON: MCGRAW-HILL, 1972.
Lua MLA (9ú heag.)DEWHURST R F. BUSINESS COST BENEFIT ANALYSIS. MCGRAW-HILL, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.