Gaya APA

Harjanto, S. (1974). Geological Progress Report On The Semberah Anticline Semberah Quadrangle - East Kalimantan . Balikpapan: Inc-Field Office.

Gaya MLA

Harjanto, Sarno. "Geological Progress Report On The Semberah Anticline Semberah Quadrangle - East Kalimantan". Balikpapan: Inc-Field Office, 1974. Bukan Logam.