Gaya APA

Tobing, S, D, S, U, W. (1980). Problems on Reutilization of Bukit Asam Lurgi Pilot Plant for Coke Making and Synthetic Fuel Oil . : Direktorat jenderal pertambangan umum mineral pusat pengembangan teknologi miner.

Gaya MLA

Tobing, SL, Dan, Sulistiyo,, Ukar, W. "Problems on Reutilization of Bukit Asam Lurgi Pilot Plant for Coke Making and Synthetic Fuel Oil". : Direktorat jenderal pertambangan umum mineral pusat pengembangan teknologi miner, 1980. Text.