Journal of Structural Engineering. Council of Scientific & Industrial Research.
Dyfyniad Arddull ChicagoJournal of Structural Engineering. Chennai: Council of Scientific & Industrial Research.
Dyfyniad MLAJournal of Structural Engineering. Council of Scientific & Industrial Research.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.