Gaya APA

Umum, D, J, P. (1980). Geological Mapping And Mineral Exploration In North-East Kalimantan Report On 1980 Field Season . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Umum, Direktorat, Jenderal, Pertambangan. "Geological Mapping And Mineral Exploration In North-East Kalimantan Report On 1980 Field Season". Bandung: Pusat Sumber Daya Geologi, 1980. Logam.