Gaya APA
Khrapkin, S. (1964).
Report On Prospecting Exploration Survey S.E Kalimantan 1963-1964 .
Indonesia:
Pusat Sumber Daya Geologi.
Gaya MLA
Khrapkin, S.G.
"Report On Prospecting Exploration Survey S.E Kalimantan 1963-1964".
Indonesia:
Pusat Sumber Daya Geologi,
1964.
Logam.