Opting out of the European Union: Diplomacy, Sovereignty and European integration Resources Type: BooksPublisher: Cambridge University PressAuthor: Rebecca Adler-NissenResource Topic: Government Public DiplomacyHistorical Public DiplomacyNon-State Actor Public DiplomacyResource Regions: EuropeTags: PD Hubeuropean uniongovernment pdeconomic and commercial relationsinternational security and stabilityinternational cooperationsuprastate diplomacy