Das, B. M., & Sivakugan, N. (2017). Fundamentals of geotechnical engineering (Fifth edition.). Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Das, Braja M., agus Nagaratnam Sivakugan. Fundamentals of Geotechnical Engineering. Fifth edition. Massachusetts: Cengage Learning, 2017.
Lua MLA (9ú heag.)Das, Braja M., agus Nagaratnam Sivakugan. Fundamentals of Geotechnical Engineering. Fifth edition. Cengage Learning, 2017.
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