Gaya APA

LTD., S, C, M, C. (1978). The Survey Report Of Southeast Kalimantan Coal . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

LTD., Sumitomo, Coal, Mining, Co.,. "The Survey Report Of Southeast Kalimantan Coal". Bandung: Pusat Sumber Daya Geologi, 1978. Batubara.