APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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