United States. National Transportation Safety Board. (1992). L'Express Airlines, Inc., flight 508, Beech C99, N7217L, weather encounter and crash near Birmingham, Alabama, July 10, 1991. The Board.
Chicago Style (17th ed.) CitationUnited States. National Transportation Safety Board. L'Express Airlines, Inc., Flight 508, Beech C99, N7217L, Weather Encounter and Crash Near Birmingham, Alabama, July 10, 1991. Washington, D.C.: The Board, 1992.
MLA (9th ed.) CitationUnited States. National Transportation Safety Board. L'Express Airlines, Inc., Flight 508, Beech C99, N7217L, Weather Encounter and Crash Near Birmingham, Alabama, July 10, 1991. The Board, 1992.
Warning: These citations may not always be 100% accurate.