Humber, W. (1861). A complete treatise on cast and wrought iron bridge construction: Including iron foundations. E & F.N. Spon.
Lua i Stíl Chicago (17ú heag.)Humber, William. A Complete Treatise on Cast and Wrought Iron Bridge Construction: Including Iron Foundations. Londres: E & F.N. Spon, 1861.
Lua MLA (9ú heag.)Humber, William. A Complete Treatise on Cast and Wrought Iron Bridge Construction: Including Iron Foundations. E & F.N. Spon, 1861.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.