Dyfyniad APA

(2012). Journal of Materials in Civil Engineering January-April 2012. ASCE.

Dyfyniad Arddull Chicago

Journal of Materials in Civil Engineering January-April 2012. ASCE, 2012.

Dyfyniad MLA

Journal of Materials in Civil Engineering January-April 2012. ASCE, 2012.

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