DAS, B. M. (2007). Principles of foundation engineering, SI. Cengage Learning.
Lua i Stíl Chicago (17ú heag.)DAS, Braja M. Principles of Foundation Engineering, SI. Cengage Learning, 2007.
Lua MLA (9ú heag.)DAS, Braja M. Principles of Foundation Engineering, SI. Cengage Learning, 2007.
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