American Association of State Highway and Transportation Officials. (1974). Manual for maintenance inspection of bridges 1974. American Association of State Highway and Transportation Officials.
Cita Chicago (17th ed.)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.
Cita MLA (9th ed.)American Association of State Highway and Transportation Officials. Manual for Maintenance Inspection of Bridges 1974. American Association of State Highway and Transportation Officials, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.