Dyfyniad APA

Powrie, W. (2004). Soil mechanics: Concepts and applications. London: Spon Press.

Dyfyniad Arddull Chicago

Powrie, William. Soil Mechanics: Concepts and Applications. London: Spon Press, 2004.

Dyfyniad MLA

Powrie, William. Soil Mechanics: Concepts and Applications. London: Spon Press, 2004.

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