Gaya APA
Energy, M, O, M, A., Mines, D, G, O. ().
Ombilin II Mine Development And Transportation Project Drilling Program Report .
Bandung:
Pusat Sumber Daya Geologi.
Gaya MLA
Energy, Ministry, Of, Mines, And., Mines, Directorate, General, Of.
"Ombilin II Mine Development And Transportation Project Drilling Program Report".
Bandung:
Pusat Sumber Daya Geologi,
.
Batubara.