Gaya APA
JR, H, T. (1956).
IRON-ORE DEPOSITS NEAR RANGGAL MOUNTAIN LAMPUNG DISTRICTS SOUTH SUMATRA .
Jakarta:
Seksi Geokimia Regional.
Gaya MLA
JR, HENRY, TARRING,.
"IRON-ORE DEPOSITS NEAR RANGGAL MOUNTAIN LAMPUNG DISTRICTS SOUTH SUMATRA".
Jakarta:
Seksi Geokimia Regional,
1956.
Bukan Logam.