APA (7th ed.) Citation

Das, B. M., & Sobhan, K. (2018). Principles of geotechnical engineering (Ninth edition, SI.). Cengage Learning.

Chicago Style (17th ed.) Citation

Das, Braja M., and Khaled Sobhan. Principles of Geotechnical Engineering. Ninth edition, SI. Boston, USA: Cengage Learning, 2018.

MLA (9th ed.) Citation

Das, Braja M., and Khaled Sobhan. Principles of Geotechnical Engineering. Ninth edition, SI. Cengage Learning, 2018.