APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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