Cita APA (7th ed.)
Das, B. M., & Sobahan Khaled. (2014). Principles of geotechnical engineering (8th ed.). New Delhi.
Cita Chicago (17th ed.)
Das, Braja M., i Sobahan Khaled. Principles of Geotechnical Engineering. 8th ed. Cengage Learning India Pvt Ltd,: New Delhi, 2014.
Cita MLA (9th ed.)
Das, Braja M., i Sobahan Khaled. Principles of Geotechnical Engineering. 8th ed. New Delhi, 2014.
Atenció: Aquestes cites poden no estar 100% correctes.