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