International Federation for Documentation\nInternational Federation for Information and Documentation\nUDC Consortium. (2022). Extensions and Corrections to the UDC. International Federation for Documentation.
Chicago-referens (17:e uppl.)International Federation for Documentation\nInternational Federation for Information and Documentation\nUDC Consortium. Extensions and Corrections to the UDC. The Hague, Holanda: International Federation for Documentation, 2022.
MLA-referens (8:e uppl.)International Federation for Documentation\nInternational Federation for Information and Documentation\nUDC Consortium. Extensions and Corrections to the UDC. International Federation for Documentation, 2022.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.