Dyfyniad APA

(2011). Journal of Construction Engineering and Management September-Desember 2011. ASCE.

Dyfyniad Arddull Chicago

Journal of Construction Engineering and Management September-Desember 2011. ASCE, 2011.

Dyfyniad MLA

Journal of Construction Engineering and Management September-Desember 2011. ASCE, 2011.

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