Gaya APA

Hartoyo, B. (1997). Laporan Perjalanan Dinas Mengikuti nedo-Coal Engineer Training Program Joint Seminar . Bandung: Dinas Vulkanologi Bagian Projek Survey Enersi Geothermal.

Gaya MLA

Hartoyo, Bambang. "Laporan Perjalanan Dinas Mengikuti nedo-Coal Engineer Training Program Joint Seminar". Bandung: Dinas Vulkanologi Bagian Projek Survey Enersi Geothermal, 1997. Batubara.