Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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