United States. National Transportation Safety Board. (2001). Uncontrolled descent and collision with terrain: United Airlines flight 585, Boeing 737-200, N999UA 4 miles south of Colorado Springs Municipal Airport, Colorado Springs, Colorado, March 3, 1991. National Transportation Safety Board.
Chicago Style (17th ed.) CitationUnited States. National Transportation Safety Board. Uncontrolled Descent and Collision with Terrain: United Airlines Flight 585, Boeing 737-200, N999UA 4 Miles South of Colorado Springs Municipal Airport, Colorado Springs, Colorado, March 3, 1991. Washington, D.C.: National Transportation Safety Board, 2001.
MLA (9th ed.) CitationUnited States. National Transportation Safety Board. Uncontrolled Descent and Collision with Terrain: United Airlines Flight 585, Boeing 737-200, N999UA 4 Miles South of Colorado Springs Municipal Airport, Colorado Springs, Colorado, March 3, 1991. National Transportation Safety Board, 2001.