Gaya APA

Rohland, D, I, W. (1957). Definition Of Task And Conclusions Of The Geological And Mining Investigations Carried Out In Indonesia In 1986 . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Rohland, Dr., Ing., W.. "Definition Of Task And Conclusions Of The Geological And Mining Investigations Carried Out In Indonesia In 1986". Bandung: Pusat Sumber Daya Geologi, 1957. Batubara.