Não informado. (1958). Industrialization and Productivity. United Nations, Department of Economic and Social Affairs.
Chicago-referens (17:e uppl.)Não informado. Industrialization and Productivity. New York: United Nations, Department of Economic and Social Affairs, 1958.
MLA-referens (8:e uppl.)Não informado. Industrialization and Productivity. United Nations, Department of Economic and Social Affairs, 1958.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.