Gaya APA

Clarke, M., H., H. (1982). Discovery of Primary Tungsten and Tin Mineralization in Northern Sumatera, Indonesia: a Case History (Buletin. DSDM.No.6.Vo.2. 1982) . : Direktorat Jenderal Pertambangan Umum.

Gaya MLA

Clarke, MCG., H., Hamidsyah. "Discovery of Primary Tungsten and Tin Mineralization in Northern Sumatera, Indonesia: a Case History (Buletin. DSDM.No.6.Vo.2. 1982)". : Direktorat Jenderal Pertambangan Umum, 1982. Text.