Columbia subject headings:
Harvard subject headings:
European Union countries--Politics and government--21st century.
European Union countries--Relations--Great Britain.
European Union--Great Britain.
European Union--Membership.
Great Britain--Politics and government--2007-
Great Britain--Relations--European Union countries.
Princeton subject headings:
European Union countries--Foreign relations--Great Britain.
European Union--Great Britain.
European Union--Membership.
Great Britain--Foreign relations--European Union countries.
Great Britain--Politics and government--2007-
Referendum--Great Britain--History--21st century.