1. Flightpath – ICAO 38th Assembly September 2013;Air Transport Action Group (ATAG),2013
2. Reducing Emissions from Aviation through Carbon-neutral Growth from 2020-Working Paper Developed for the 38th ICAO Assembly September/October 2013;Air Transport Action Group (ATAG),2013
3. Global Market Forecast – Future Journeys 2013 2032;Airbus,2013
4. Annual Round-trip Fares and Fees: Domestic;Airlines for America (A4A),2013
5. Annual Round-trip Fares and Fees: International;Airlines for America (A4A),2013