Gaya APA

Duisburg, D, N, G, M, B, H. (1957). Briqueting Test With Clay Ore And Coal From SE Kalimantan . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Duisburg, Demag-Humboldt, Niederschachtofen, G, M, B, H. "Briqueting Test With Clay Ore And Coal From SE Kalimantan". Bandung: Pusat Sumber Daya Geologi, 1957. Batubara.