APA

American Association of State Highway and, Transportation Officials & AASTO GTB-1. (1977). Guide for selecting, locating, and designing traffic barriers. Washington DC: American Association of State Highway and.

Chicago

American Association of State Highway and, Transportation Officials and AASTO GTB-1. 1977. Guide for selecting, locating, and designing traffic barriers. Washington DC: American Association of State Highway and.

Harvard

American Association of State Highway and, Transportation Officials and AASTO GTB-1. (1977). Guide for selecting, locating, and designing traffic barriers. Washington DC: American Association of State Highway and.

MLA

American Association of State Highway and, Transportation Officials and AASTO GTB-1. Guide for selecting, locating, and designing traffic barriers. Washington DC: American Association of State Highway and. 1977.