Dyfyniad APA

Das, B. M. (1997). Principles of geotechnical engineering (4.). International Thomson Publishing company.

Dyfyniad Arddull Chicago

Das, Braja M. Principles of Geotechnical Engineering. 4. Boston: International Thomson Publishing company, 1997.

Dyfyniad MLA

Das, Braja M. Principles of Geotechnical Engineering. 4. International Thomson Publishing company, 1997.

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