Não informado. (1979). Europe. Delegation of the Commission of the European Communities.
Chicago-referens (17:e uppl.)Não informado. Europe. Washington: Delegation of the Commission of the European Communities, 1979.
MLA-referens (8:e uppl.)Não informado. Europe. Delegation of the Commission of the European Communities, 1979.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.