Gaya APA

Gunther, D, I, C. (1956). Preliminary report on the rehabilitation of the Ombilin Coal Mines. "Wedexro" 1956, Vol. 3 Fasc. 3c. . Bandung: Direktorat Batubara.

Gaya MLA

Gunther, Dr., Ing., C. "Preliminary report on the rehabilitation of the Ombilin Coal Mines. "Wedexro" 1956, Vol. 3 Fasc. 3c.". Bandung: Direktorat Batubara, 1956. Batubara.