American Association of State Highway and Transportation Officials. Subcommittee on Bridges and Structures. (2014). 2015 interim revisions to Standard specifications for structural supports for highway signs, luminaires, and traffic signals (Sixth edition 2013.). American Association of State Highway and Transportation Officials.
Chicago Style (17th ed.) CitationAmerican Association of State Highway and Transportation Officials. Subcommittee on Bridges and Structures. 2015 Interim Revisions to Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals. Sixth edition 2013. Washington, D.C.: American Association of State Highway and Transportation Officials, 2014.
MLA (8th ed.) CitationAmerican Association of State Highway and Transportation Officials. Subcommittee on Bridges and Structures. 2015 Interim Revisions to Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals. Sixth edition 2013. American Association of State Highway and Transportation Officials, 2014.