Lua APA (7ú heag.)
Das, B. M., & Sobahan Khaled. (2014). Principles of geotechnical engineering (8th ed.). New Delhi.
Lua i Stíl Chicago (17ú heag.)
Das, Braja M., agus Sobahan Khaled. Principles of Geotechnical Engineering. 8th ed. Cengage Learning India Pvt Ltd,: New Delhi, 2014.
Lua MLA (9ú heag.)
Das, Braja M., agus Sobahan Khaled. Principles of Geotechnical Engineering. 8th ed. New Delhi, 2014.
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