Gaya APA

Project, T, W, C, O, O, I, C, E. (1992). Enterim Report of The Semi-Detailed Exploration on Ombilin III Coal Project . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Project, The, Working, Comittee, Of, Ombilin, III, CoAL, Exploration. "Enterim Report of The Semi-Detailed Exploration on Ombilin III Coal Project". Bandung: Pusat Sumber Daya Geologi, 1992. Batubara.