Gaya APA

Batubara, P, T, P. (1986). South Sumatra Coal Exploration Project Banko Barat Feasibility Study And Transportation Study . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Batubara, Presentation, To, Pankorbang. "South Sumatra Coal Exploration Project Banko Barat Feasibility Study And Transportation Study". Bandung: Pusat Sumber Daya Geologi, 1986. Batubara.