Dyfyniad APA

(2011). Journal of construction engineering and management 2011. ASCE.

Dyfyniad Arddull Chicago

Journal of Construction Engineering and Management 2011. ASCE, 2011.

Dyfyniad MLA

Journal of Construction Engineering and Management 2011. ASCE, 2011.

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