Gaya APA
Geologi, P, S, D. (1999/2000).
Interim Report On Tanjung Enim IV Coal Exploration Project -South Arahan .
Bandung:
The working Committee of The ombilin III coal exloration project.
Gaya MLA
Geologi, Pusat, Sumber, Daya.
"Interim Report On Tanjung Enim IV Coal Exploration Project -South Arahan".
Bandung:
The working Committee of The ombilin III coal exloration project,
1999/2000.
Batubara.