Hopkins, W. J. (2002). Devolution in context: Regional, federal & devolved government in the member states of the European Union. Cavendish Pub.
Chicago-referens (17:e uppl.)Hopkins, W. John. Devolution in Context: Regional, Federal & Devolved Government in the Member States of the European Union. London: Cavendish Pub, 2002.
MLA-referens (9:e uppl.)Hopkins, W. John. Devolution in Context: Regional, Federal & Devolved Government in the Member States of the European Union. Cavendish Pub, 2002.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.