Dyfyniad APA

(2006). Journal of Contruction Engineering and Management Juli 2006. ASCE.

Dyfyniad Arddull Chicago

Journal of Contruction Engineering and Management Juli 2006. ASCE, 2006.

Dyfyniad MLA

Journal of Contruction Engineering and Management Juli 2006. ASCE, 2006.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.