(1997). 1996 air traffic services: National Airspace System modernization, commissioning, and replacement report.
Chicago Style (17th ed.) Zitazioa1996 Air Traffic Services: National Airspace System Modernization, Commissioning, and Replacement Report. 1997.
MLA (9th ed.) Zitazioa1996 Air Traffic Services: National Airspace System Modernization, Commissioning, and Replacement Report. 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.