Gaya APA

Duisburg, D, N, G, M, B, H. (1957). Briquetting Teast With Clay Ore And Coal From SE-Kalimantan "Wedexro" Vol 5, Fasc 4c, 1957 . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Duisburg, Demag-Humboldt, Niederschachtofen, G, M, B, H. "Briquetting Teast With Clay Ore And Coal From SE-Kalimantan "Wedexro" Vol 5, Fasc 4c, 1957". Bandung: Pusat Sumber Daya Geologi, 1957. Batubara.