Dillingham, G. L. (2007). Next Generation Air Transportation System: Status of the transition to the future air traffic control system : testimony before the Subcommittee on Aviation, Committee on Transportation and Infrastructure, House of Representatives. U.S. Govt. Accountability Office.
Chicago Style (17th ed.) CitationDillingham, Gerald Lee. Next Generation Air Transportation System: Status of the Transition to the Future Air Traffic Control System : Testimony Before the Subcommittee on Aviation, Committee on Transportation and Infrastructure, House of Representatives. [Washington, D.C.]: U.S. Govt. Accountability Office, 2007.
MLA (9th ed.) CitationDillingham, Gerald Lee. Next Generation Air Transportation System: Status of the Transition to the Future Air Traffic Control System : Testimony Before the Subcommittee on Aviation, Committee on Transportation and Infrastructure, House of Representatives. U.S. Govt. Accountability Office, 2007.