Gaya APA

Daulay, B, &, S, U. (1995). Characteristics of Indonesian Coals and Their Influences on Utilization: A Case On Clean Coal Technology Issue . : mineral technology research and development centre.

Gaya MLA

Daulay, Bukin, &, Soelistijo, U.W.. "Characteristics of Indonesian Coals and Their Influences on Utilization: A Case On Clean Coal Technology Issue". : mineral technology research and development centre, 1995. Text.