International Air Transport Association. 17 August 2013閲覧。 ^ a b “Glasgow – EGPF”. UK Integrated Aeronautical Information Package. NationalAirTrafficServices. 25
Jonathan (September 19, 2007). “A Ranking Writ In Brake Lights: D.C. 2nd in Traffic”. The Washington Post. http://www.washingtonpost.com/wp-dyn/content/ar