Gaya APA
Warganegara, M. (1963).
Future Prospect Of The Iron & Steel Industry In Indonesia .
Banjarbaru:
Direktorat Sumber Daya Mineral.
Gaya MLA
Warganegara, Marjuni.
"Future Prospect Of The Iron & Steel Industry In Indonesia".
Banjarbaru:
Direktorat Sumber Daya Mineral,
1963.
Batubara.