Gaya APA
Harjanto, S. (1987).
The Most Promising Phosphate Deposits In jawa And Madura .
Bandung:
Pusat Sumber Daya Geologi.
Gaya MLA
Harjanto, S..
"The Most Promising Phosphate Deposits In jawa And Madura".
Bandung:
Pusat Sumber Daya Geologi,
1987.
Bukan Logam.