Dyfyniad APA

Das, B. M. (1999). Principles of foundation engineering (4th.ed.). PWS.

Dyfyniad Arddull Chicago

Das, Braja M. Principles of Foundation Engineering. 4th.ed. Pacific Grove: PWS, 1999.

Dyfyniad MLA

Das, Braja M. Principles of Foundation Engineering. 4th.ed. PWS, 1999.

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