American Association of State Highway and Transportation Officials Task Force for Environmental Design. (1991). A Guide for transportation landscape and environmental design. American Association of State Highway and Transportation Officials.
Παραπομπή σε μορφή Chicago (17η εκδ.)American Association of State Highway and Transportation Officials Task Force for Environmental Design. A Guide for Transportation Landscape and Environmental Design. American Association of State Highway and Transportation Officials, 1991.
Παραπομπή σε μορφή MLA (8th εκδ.)American Association of State Highway and Transportation Officials Task Force for Environmental Design. A Guide for Transportation Landscape and Environmental Design. American Association of State Highway and Transportation Officials, 1991.