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 Jenderal Pertambangan Umum 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 Jenderal Pertambangan Umum Direktorat Batubara, 1956. Batubara.