Gaya APA
GOLD, D. (1982).
Muara Tiga Project Technical Proposal Of Coal Exploration Consultant .
Bandung:
Pusat Sumber Daya Geologi.
Gaya MLA
GOLD, DR.OTTO.
"Muara Tiga Project Technical Proposal Of Coal Exploration Consultant".
Bandung:
Pusat Sumber Daya Geologi,
1982.
Batubara.