Gaya APA

Geologi, P, S, D. (1991/1992). Presentation On Ombilin III Coal Exploration Project Fiscal Year 1991/1992 In Jakarta . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Geologi, Pusat, Sumber, Daya. "Presentation On Ombilin III Coal Exploration Project Fiscal Year 1991/1992 In Jakarta". Bandung: Pusat Sumber Daya Geologi, 1991/1992. Batubara.