American Association of State Highway and Transportation Officials. (1974). Manual for maintenance inspection of bridges 1974. American Association of State Highway and Transportation Officials.
Chicago-referens (17:e uppl.)American Association of State Highway and Transportation Officials. Manual for Maintenance Inspection of Bridges 1974. Washington, D.C: American Association of State Highway and Transportation Officials, 1974.
MLA-referens (9:e uppl.)American Association of State Highway and Transportation Officials. Manual for Maintenance Inspection of Bridges 1974. American Association of State Highway and Transportation Officials, 1974.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.