Dyfyniad APA
Das, B. M., & Sobahan Khaled. (2014). Principles of geotechnical engineering (8th ed.). New Delhi.
Dyfyniad Arddull Chicago
Das, Braja M., and Sobahan Khaled. Principles of Geotechnical Engineering. 8th ed. Cengage Learning India Pvt Ltd,: New Delhi, 2014.
Dyfyniad MLA
Das, Braja M., and Sobahan Khaled. Principles of Geotechnical Engineering. 8th ed. New Delhi, 2014.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.