Das, B. M. (1997). Principles of geotechnical engineering (4.). International Thomson Publishing company.
Chicago Style aipamenaDas, Braja M. Principles of Geotechnical Engineering. 4. Boston: International Thomson Publishing company, 1997.
MLA aipamenaDas, Braja M. Principles of Geotechnical Engineering. 4. International Thomson Publishing company, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.