International Federation for Documentation\nInternational Federation for Information and Documentation\nUDC Consortium. (2022). Extensions and Corrections to the UDC. International Federation for Documentation.
Lua i Stíl Chicago (17ú heag.)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.
Lua MLA (8ú heag.)International Federation for Documentation\nInternational Federation for Information and Documentation\nUDC Consortium. Extensions and Corrections to the UDC. International Federation for Documentation, 2022.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.