Cita APA

American Association of State Highway Officials. (1949). Policy on maintenance of shoulders, road approaches and sidewalks: Policy on maintenance of roadsides. Washington: American Association of State Highway Officials.

Citación estilo Chicago

American Association of State Highway Officials. Policy On Maintenance of Shoulders, Road Approaches and Sidewalks: Policy On Maintenance of Roadsides. Washington: American Association of State Highway Officials, 1949.

Cita MLA

American Association of State Highway Officials. Policy On Maintenance of Shoulders, Road Approaches and Sidewalks: Policy On Maintenance of Roadsides. Washington: American Association of State Highway Officials, 1949.