Gaya APA

Ltd, C, I, &, C. (1974). Reconnaissance Report On The Berau Coal Kalimantan, Indonesia. Made In May 1974 . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Ltd, C., Itoha, &, Co.,. "Reconnaissance Report On The Berau Coal Kalimantan, Indonesia. Made In May 1974". Bandung: Pusat Sumber Daya Geologi, 1974. Batubara.