United States. Federal Highway Administration. Visual impact assessment for highway projects. American Society of Landscape Architects.
Cita Chicago (17th ed.)United States. Federal Highway Administration. Visual Impact Assessment for Highway Projects. Washington: American Society of Landscape Architects.
Cita MLA (9th ed.)United States. Federal Highway Administration. Visual Impact Assessment for Highway Projects. American Society of Landscape Architects.
Atenció: Aquestes cites poden no estar 100% correctes.