Gaya APA
INDONESIA, R, O. (1981).
BUKIT ASAM COAL MINING DEVELOPMENT AND TRANSPORTATION PROJECT .
Bandung:
Pusat Sumber Daya Geologi.
Gaya MLA
INDONESIA, REPUBLIC, OF.
"BUKIT ASAM COAL MINING DEVELOPMENT AND TRANSPORTATION PROJECT".
Bandung:
Pusat Sumber Daya Geologi,
1981.
Batubara.