Dyfyniad APA
Das, B. M. (2002). Principles of geotechnical engineering (5th ed.). Thomson.
Dyfyniad Arddull Chicago
Das, Braja M. Principles of Geotechnical Engineering. 5th ed. Singapore: Thomson, 2002.
Dyfyniad MLA
Das, Braja M. Principles of Geotechnical Engineering. 5th ed. Thomson, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.