Gaya APA

Dhadar, R. (1961). GEOLOGICAL INVESTIGATION PERFORMED FOR THE SODA ASH PROJECT IN INDONESIA PART E. THE PADANG INDARUNG AREA. . Bandung: Direktorat Sumber Daya Mineral.

Gaya MLA

Dhadar, Rainir. "GEOLOGICAL INVESTIGATION PERFORMED FOR THE SODA ASH PROJECT IN INDONESIA PART E. THE PADANG INDARUNG AREA.". Bandung: Direktorat Sumber Daya Mineral, 1961. Batubara.