Gaya APA

Technology, U, D, O, E, A, S, F, F, E, O, O, C, C. (1994). The Clean Coal Technology Program Lessons Learned . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Technology, U.S, Department, Of, Energy, Assistant, Secretary, For, Fossil, Energy, Office, Of, Clean, Coal. "The Clean Coal Technology Program Lessons Learned". Bandung: Pusat Sumber Daya Geologi, 1994. Batubara.