Airport Authority Hong Kong (AAHK)
 http://www.hongkongairport.com/
Civil Aviation Department (CAD)
 http://www.cad.gov.hk/
International Air Transport Association (IATA)
 http://www.iata.org/
International Civil Aviation Organization (ICAO)
 http://www.icao.int/
Norman Shanks Associates International (NSAI)
 http://www.nsai.co.uk/