Não informado. Financial Times North Sea Letter and European Offshore News. Financial Times Business Information.
Chicago-referens (17:e uppl.)Não informado. Financial Times North Sea Letter and European Offshore News. London: Financial Times Business Information.
MLA-referens (8:e uppl.)Não informado. Financial Times North Sea Letter and European Offshore News. Financial Times Business Information.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.