Dyfyniad APA
Das, B. M. (2010). Principles of geotechnical engineering (7th ed.). New Delhi.
Dyfyniad Arddull Chicago
Das, Braja M. Principles of Geotechnical Engineering. 7th ed. Cengage Learning India Pvt Ltd,: New Delhi, 2010.
Dyfyniad MLA
Das, Braja M. Principles of Geotechnical Engineering. 7th ed. New Delhi, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.