Gaya APA

Sumiati, T., Ningrum, N, S. (2002). Indonesian Coal Liquefaction Using Ore Catalyst . : Mineral and Coal Technology Research and Development Centre.

Gaya MLA

Sumiati, Teti., Ningrum, Nining, Sundini. "Indonesian Coal Liquefaction Using Ore Catalyst". : Mineral and Coal Technology Research and Development Centre, 2002. Text.