United States. National Transportation Safety Board. (1998). Head-on collision, Union Pacific Railroad, Nacco, Wyoming, January 31, 1996. National Transportation Safety Board.
Chicago Style (17th ed.) CitationUnited States. National Transportation Safety Board. Head-on Collision, Union Pacific Railroad, Nacco, Wyoming, January 31, 1996. Washington, D.C.: National Transportation Safety Board, 1998.
MLA (9th ed.) CitationUnited States. National Transportation Safety Board. Head-on Collision, Union Pacific Railroad, Nacco, Wyoming, January 31, 1996. National Transportation Safety Board, 1998.
Warning: These citations may not always be 100% accurate.