Gaya APA
Das, Braja M. (2012).
Principles of foundation engineering .
Australia:
Cengage Learning.
Gaya Chicago
Das, Braja M.
Principles of foundation engineering.
Australia:
Cengage Learning,
2012.
Text.
Gaya MLA
Das, Braja M.
Principles of foundation engineering.
Australia:
Cengage Learning,
2012.
Text.
Gaya Turabian
Das, Braja M.
Principles of foundation engineering.
Australia:
Cengage Learning,
2012.
Print.