Gaya APA

International, C, D, F. (1985). Ombilin III Project Exploration Mining Feasibility Study . Bandung: Charbonnages de france international.

Gaya MLA

International, Charbonnages, De, France. "Ombilin III Project Exploration Mining Feasibility Study". Bandung: Charbonnages de france international, 1985. Batubara.