Gaya APA
Das, Braja M.. (1990).
Principles of Geotechnical Engineering (Second Ed.).
Boston:
PWS-KENT Publihing Company.
Gaya Chicago
Das, Braja M..
Principles of Geotechnical Engineering.
Second Ed.
Boston:
PWS-KENT Publihing Company,
1990.
Text.
Gaya MLA
Das, Braja M..
Principles of Geotechnical Engineering.
Second Ed.
Boston:
PWS-KENT Publihing Company,
1990.
Text.
Gaya Turabian
Das, Braja M..
Principles of Geotechnical Engineering.
Second Ed.
Boston:
PWS-KENT Publihing Company,
1990.
Print.