Gaya APA

Sofaeti, Y. (1994). Laporan Mengikuti Clean Coal Technology Training Course Sydney, 28 November-7 Desember 1994 . Jakarta-Indonesia: Pusat Sumber Daya Geologi.

Gaya MLA

Sofaeti, Yenny. "Laporan Mengikuti Clean Coal Technology Training Course Sydney, 28 November-7 Desember 1994". Jakarta-Indonesia: Pusat Sumber Daya Geologi, 1994. Batubara.