Gaya APA
Das, Braja M.. (2007).
Principle of Foundation Engineering .
Usa:
Thomson.
Gaya Chicago
Das, Braja M..
Principle of Foundation Engineering.
Usa:
Thomson,
2007.
Text.
Gaya MLA
Das, Braja M..
Principle of Foundation Engineering.
Usa:
Thomson,
2007.
Text.
Gaya Turabian
Das, Braja M..
Principle of Foundation Engineering.
Usa:
Thomson,
2007.
Print.