United Nations Industrial Development Organization. (1975). Information sources on the glass industry. United Nations.
Chicago-referens (17:e uppl.)United Nations Industrial Development Organization. Information Sources on the Glass Industry. New York: United Nations, 1975.
MLA-referens (9:e uppl.)United Nations Industrial Development Organization. Information Sources on the Glass Industry. United Nations, 1975.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.