Gaya APA

Project, W, C, O, C, S, C, E. (1988). Report On Semi Detailed Exploration Of Central Sumatra Coal Exploration Project . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Project, Working, Commitee, Of, Central, Sumatera, Coal, Eksploration. "Report On Semi Detailed Exploration Of Central Sumatra Coal Exploration Project". Bandung: Pusat Sumber Daya Geologi, 1988. Batubara.