Gaya APA
Das, Braja M. (2010).
Principles of geotechnical engineering (7).
Stamford USA:
Cengage Learning.
Gaya Chicago
Das, Braja M.
Principles of geotechnical engineering.
7
Stamford USA:
Cengage Learning,
2010.
Text.
Gaya MLA
Das, Braja M.
Principles of geotechnical engineering.
7
Stamford USA:
Cengage Learning,
2010.
Text.
Gaya Turabian
Das, Braja M.
Principles of geotechnical engineering.
7
Stamford USA:
Cengage Learning,
2010.
Print.