Gaya APA
Djaswadi, S. (1993).
Prospective of base metal minerals in Indonesia .
Bandung:
Direkorat Sumber Daya Mineral.
Gaya MLA
Djaswadi, Sukirno.
"Prospective of base metal minerals in Indonesia".
Bandung:
Direkorat Sumber Daya Mineral,
1993.
Textbook.