Gaya APA
Ubaghs, J, G, H. (1940).
The Occurrence Of Copper, Lead-And Zinc-Ores In Borneo .
Indonesia:
Pusat Sumber Daya Geologi.
Gaya MLA
Ubaghs, J., G., H.
"The Occurrence Of Copper, Lead-And Zinc-Ores In Borneo".
Indonesia:
Pusat Sumber Daya Geologi,
1940.
Logam.