American Association of State Highway Officials. (1958). Policy on maintenance of shoulders, road approaches and sidewalks: Policy on maintenance of roadsides. American Association of State Highway Officials.
Chicago Style (17th ed.) CitationAmerican Association of State Highway Officials. Policy on Maintenance of Shoulders, Road Approaches and Sidewalks: Policy on Maintenance of Roadsides. Washington, D.C.: American Association of State Highway Officials, 1958.
MLA (8th ed.) CitationAmerican Association of State Highway Officials. Policy on Maintenance of Shoulders, Road Approaches and Sidewalks: Policy on Maintenance of Roadsides. American Association of State Highway Officials, 1958.
Warning: These citations may not always be 100% accurate.