hansen, b. (1962). output- productivity and value added- productivity. the institute of national planning.
Lua i Stíl Chicago (17ú heag.)hansen, bent. Output- Productivity and Value Added- Productivity. cairo: the institute of national planning, 1962.
Lua MLA (9ú heag.)hansen, bent. Output- Productivity and Value Added- Productivity. the institute of national planning, 1962.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.