Gaya APA
Ramelan, ., Bemmelen, R, W, V. (1949).
The Geology Of Indonesia Vol. Ii: Economic Geology .
The Hague:
Goverment Printing Office.
Gaya MLA
Ramelan, ., Bemmelen, R., W., Van.
"The Geology Of Indonesia Vol. Ii: Economic Geology".
The Hague:
Goverment Printing Office,
1949.
Text.