Humber, W. (1861). A complete treatise on cast and wrought iron bridge construction: Including iron foundations. E & F.N. Spon.
Chicago-referens (17:e uppl.)Humber, William. A Complete Treatise on Cast and Wrought Iron Bridge Construction: Including Iron Foundations. Londres: E & F.N. Spon, 1861.
MLA-referens (9:e uppl.)Humber, William. A Complete Treatise on Cast and Wrought Iron Bridge Construction: Including Iron Foundations. E & F.N. Spon, 1861.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.