American Society of Landscape Architects. Foundation. (1976). Access to the environment: A series of reference documents on the design and development of site facilities to make them barrier free to the physically handicapped and disabled. Dept. of Housing and Urban Development. Office of Policy Development and Research.
Cita Chicago (17th ed.)American Society of Landscape Architects. Foundation. Access to the Environment: A Series of Reference Documents on the Design and Development of Site Facilities to Make Them Barrier Free to the Physically Handicapped and Disabled. [Washington]: Dept. of Housing and Urban Development. Office of Policy Development and Research, 1976.
Cita MLA (8th ed.)American Society of Landscape Architects. Foundation. Access to the Environment: A Series of Reference Documents on the Design and Development of Site Facilities to Make Them Barrier Free to the Physically Handicapped and Disabled. Dept. of Housing and Urban Development. Office of Policy Development and Research, 1976.