Das, B. M., & Sobhan, K. (2018). Principles of geotechnical engineering (Ninth edition, SI edition.). Cengage Learning.
Čikaški stil citiranja (17. izdanje)Das, Braja M., i Khaled Sobhan. Principles of Geotechnical Engineering. Ninth edition, SI edition. Boston: Cengage Learning, 2018.
MLA način citiranja (9. izdanje)Das, Braja M., i Khaled Sobhan. Principles of Geotechnical Engineering. Ninth edition, SI edition. Cengage Learning, 2018.
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