Dyfyniad APA

Das, B. M. (2007). Principles of geotechnical engineering (6th ed.). Thomson.

Dyfyniad Arddull Chicago

Das, Braja M. Principles of Geotechnical Engineering. 6th ed. Australia: Thomson, 2007.

Dyfyniad MLA

Das, Braja M. Principles of Geotechnical Engineering. 6th ed. Thomson, 2007.

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