Gaya APA

Energy, M, O, M, A., Mines, D, G, O. (1985). Ombilin II Coal Development And Transportation Project Coal Quality Testing Report . Canada: John Wiley & Sons. Inc.

Gaya MLA

Energy, Ministry, Of, Mines, And., Mines, Directorate, General, Of. "Ombilin II Coal Development And Transportation Project Coal Quality Testing Report". Canada: John Wiley & Sons. Inc, 1985. Batubara.