Gaya APA

Harjanto, S. (). Geological progress report on the pembulan anticline Kotabangun Quadrangle-East Kalimantan . Jakarta: For : Roy. Huffington Inc. Field Office Balikpapan-East Kalimantan.

Gaya MLA

Harjanto, Sarno. "Geological progress report on the pembulan anticline Kotabangun Quadrangle-East Kalimantan". Jakarta: For : Roy. Huffington Inc. Field Office Balikpapan-East Kalimantan, . Bukan Logam.