Gaya APA

M., C., D, J, B, P. (1981). The East Kalimantan Coal Project Report On The Coal Geology Of South Sekakanan Kutai Basin, East Kalimantan . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

M., Colin., D, Jones, Ba, Ph. "The East Kalimantan Coal Project Report On The Coal Geology Of South Sekakanan Kutai Basin, East Kalimantan". Bandung: Pusat Sumber Daya Geologi, 1981. Batubara.