Dyfyniad APA
Das, B. M. (2007). Principles of foundation engineering. Thomson/Brooks/Cole.
Dyfyniad Arddull Chicago
Das, Braja M. Principles of Foundation Engineering. New Delhi: Thomson/Brooks/Cole, 2007.
Dyfyniad MLA
Das, Braja M. Principles of Foundation Engineering. Thomson/Brooks/Cole, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.