Dyfyniad APA
Foundation design and construction / Tomlinson, M. J: Pitmen and sons.
Dyfyniad Arddull Chicago
Foundation Design and Construction / Tomlinson, M. J: Pitmen and Sons.
Dyfyniad MLA
Foundation Design and Construction / Tomlinson, M. J: Pitmen and Sons.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.