Não informado. (1958). Industrialization and Productivity. United Nations, Department of Economic and Social Affairs.
Lua i Stíl Chicago (17ú heag.)Não informado. Industrialization and Productivity. New York: United Nations, Department of Economic and Social Affairs, 1958.
Lua MLA (8ú heag.)Não informado. Industrialization and Productivity. United Nations, Department of Economic and Social Affairs, 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.