Gaya APA

T.Madiadipoera, ., G.trafomov, . (1966). Report On Prospecting -Reconalisannce Survey On Coal at mahamk Besar and sungai kalian ( Upper Course Of Mahakam River Region ),East kalimantan . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

T.Madiadipoera, ., G.trafomov, . "Report On Prospecting -Reconalisannce Survey On Coal at mahamk Besar and sungai kalian ( Upper Course Of Mahakam River Region ),East kalimantan". Bandung: Pusat Sumber Daya Geologi, 1966. Batubara.