Gaya APA

Project, W, C, O, C, S, C, E. (1987). Report On Preliminary Expretion Of Central Sumatera Exploration Project . Bandung: Working Committee Of Central Sumatera Coal Exploration Project.

Gaya MLA

Project, Working, Commitee, Of, Central, Sumatera, Coal, Eksploration. "Report On Preliminary Expretion Of Central Sumatera Exploration Project". Bandung: Working Committee Of Central Sumatera Coal Exploration Project, 1987. Batubara.