Gaya APA
JALAN, P, L. (1997).
National seminar on technology of roads and bridges on soft soils, volume 2 .
:
Bina Marga.
Gaya MLA
JALAN, PUSAT, LITBANG.
"National seminar on technology of roads and bridges on soft soils, volume 2".
:
Bina Marga,
1997.
Filmstrip.