Gaya APA
Erickson, R, L. (1967).
Geological Survey Program in Geochemical Exploration Research .
Bandung:
Direktorat Sumber Daya Mineral.
Gaya MLA
Erickson, Ralph, L.
"Geological Survey Program in Geochemical Exploration Research".
Bandung:
Direktorat Sumber Daya Mineral,
1967.
Umum.