Gaya APA
Watanabe, M. (1970).
Third Progress Report On The General Survay In Sumatra Block No.5 .
Bandung:
Pusat Sumber Daya Geologi.
Gaya MLA
Watanabe, Makoto.
"Third Progress Report On The General Survay In Sumatra Block No.5".
Bandung:
Pusat Sumber Daya Geologi,
1970.
Bukan Logam.