Não informado. (2004). Highway research circular. National Research Council, Highway Research Board.
Lua i Stíl Chicago (17ú heag.)Não informado. Highway Research Circular. Washington: National Research Council, Highway Research Board, 2004.
Lua MLA (8ú heag.)Não informado. Highway Research Circular. National Research Council, Highway Research Board, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.