APA Citation

Das, B. M., & Sobhan, K. Principles of geotechnical engineering (Ninth Edition.).

Chicago Style Citation

Das, Braja M., and Khaled Sobhan. Principles of Geotechnical Engineering. Ninth Edition.

MLA Citation

Das, Braja M., and Khaled Sobhan. Principles of Geotechnical Engineering. Ninth Edition.

Warning: These citations may not always be 100% accurate.