United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Aviation Operations, Safety, and Security. (2014). NextGen: A Review of Progress, Challenges, and Opportunities for Improving Aviation Safety and Efficiency. ProQuest.
Chicago Style (17th ed.) CitationUnited States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Aviation Operations, Safety, and Security. NextGen: A Review of Progress, Challenges, and Opportunities for Improving Aviation Safety and Efficiency. Bethesda, Md.: ProQuest, 2014.
MLA (9th ed.) CitationUnited States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Aviation Operations, Safety, and Security. NextGen: A Review of Progress, Challenges, and Opportunities for Improving Aviation Safety and Efficiency. ProQuest, 2014.