Não informado. List of Selected Articles on ICAO. International Civil Aviation Organization.
Chicago-referens (17:e uppl.)Não informado. List of Selected Articles on ICAO. Montreal, Canada: International Civil Aviation Organization.
MLA-referens (8:e uppl.)Não informado. List of Selected Articles on ICAO. International Civil Aviation Organization.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.