Gaya APA
INDONESIA, P, H, P. (1978).
ORE RESERVE ASSESSMENT KELAPA KAMPIT VOLUME 1. .
Bandung:
Direktorat Sumber Daya Mineral.
Gaya MLA
INDONESIA, PT.BROKEN, HILL, PROPRIETARY.
"ORE RESERVE ASSESSMENT KELAPA KAMPIT VOLUME 1.".
Bandung:
Direktorat Sumber Daya Mineral,
1978.
Batubara.