Gaya APA

Sigit, S. (1964). A Brief Explanatory Note To The Disrtribution Map Of Coal Deposits Industrial Minerals And Rocks Of Indonesia . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Sigit, Soetardjo. "A Brief Explanatory Note To The Disrtribution Map Of Coal Deposits Industrial Minerals And Rocks Of Indonesia". Bandung: Pusat Sumber Daya Geologi, 1964. Batubara.