Gaya APA

engineers, D, G, C. (1983). Republic Of Indonesia Directorat General Of Mines Muara Tiga Coal Exploration Project . Bandung: Directorate Of Mineral Resources.

Gaya MLA

engineers, DR.otto, Gold, Consulting. "Republic Of Indonesia Directorat General Of Mines Muara Tiga Coal Exploration Project". Bandung: Directorate Of Mineral Resources, 1983. Batubara.