Sozen, A. M. (1981). Significant Development Engineering Practice and Reserch. American Concrete Institute.
Dyfyniad Arddull ChicagoSozen, A. Mete. Significant Development Engineering Practice and Reserch. Michigan: American Concrete Institute, 1981.
Dyfyniad MLASozen, A. Mete. Significant Development Engineering Practice and Reserch. American Concrete Institute, 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.