Gaya APA

Geologi, P, S, D. (1987). Towards An Optimization Of Indonesian Coal Utilization Related To The National Energy Policy . Bandung: Direktorat Sumber Daya Mineral.

Gaya MLA

Geologi, Pusat, Sumber, Daya. "Towards An Optimization Of Indonesian Coal Utilization Related To The National Energy Policy". Bandung: Direktorat Sumber Daya Mineral, 1987. Batubara.