Gaya APA

Report On Exploration Of Central Sumatra Coal Exploration Project. Appendix IV Coal Analysis. (1990). Bandung: Working Committee Of Central Sumatera Coal Exploration Project.

Gaya MLA

Report On Exploration Of Central Sumatra Coal Exploration Project. Appendix IV Coal Analysis. . Bandung: Working Committee Of Central Sumatera Coal Exploration Project, 1990. Batubara.