APA (7th ed.) Zitazioa
Das, B. M., & Sobahan, K. (2018). Principles of Geotechnical Engineering (9th ed.). Cengage Learning.
Chicago Style (17th ed.) Zitazioa
Das, Braja M., eta Khaled Sobahan. Principles of Geotechnical Engineering. 9th ed. New Delhi: Cengage Learning, 2018.
MLA (9th ed.) Zitazioa
Das, Braja M., eta Khaled Sobahan. Principles of Geotechnical Engineering. 9th ed. Cengage Learning, 2018.
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