NATIONAL, R. C. (1985). Highway Capacity Manual (special Report 209). Transportation Research Board.
Lua i Stíl Chicago (17ú heag.)NATIONAL, Research Council. Highway Capacity Manual (special Report 209). Transportation Research Board, 1985.
Lua MLA (8ú heag.)NATIONAL, Research Council. Highway Capacity Manual (special Report 209). Transportation Research Board, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.