Gaya APA
SEAL, K. (1971).
Operational research its application in the ceramic industry .
Bandung:
Direktorat Inventarisasi Sumber Daya Mineral.
Gaya MLA
SEAL, K.E..
"Operational research its application in the ceramic industry".
Bandung:
Direktorat Inventarisasi Sumber Daya Mineral,
1971.
Umum.