Não informado. (1972). Civil engineering technician. Institution of Civil Engineers.
Lua i Stíl Chicago (17ú heag.)Não informado. Civil Engineering Technician. London: Institution of Civil Engineers, 1972.
Lua MLA (8ú heag.)Não informado. Civil Engineering Technician. Institution of Civil Engineers, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.