National Cooperative Highway Research Program. Summary of progress - National Cooperative Highway Research Program 2005. Highway Research Board, National Research Council.
Chicago-referens (17:e uppl.)National Cooperative Highway Research Program. Summary of Progress - National Cooperative Highway Research Program 2005. [Washington]: Highway Research Board, National Research Council.
MLA-referens (9:e uppl.)National Cooperative Highway Research Program. Summary of Progress - National Cooperative Highway Research Program 2005. Highway Research Board, National Research Council.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.