Não informado. (1948). Highway Engineer. Institution of Highway Engineers.
Lua i Stíl Chicago (17ú heag.)Não informado. Highway Engineer. London: Institution of Highway Engineers, 1948.
Lua MLA (8ú heag.)Não informado. Highway Engineer. Institution of Highway Engineers, 1948.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.