Gaya APA
Das, B, M.
(1994).
Principles of geotechnical engineering / Braja M. Das
(
Ed.ke-3)
.
:
PWS Publishing Company.
Gaya MLA
Das, Braja, M..
"Principles of geotechnical engineering / Braja M. Das".
Ed.ke-3
:
PWS Publishing Company,
1994.
Skripsi.