Gaya APA
Mitchelll, D. (1953).
PROPOSAL FOR A SHORET TERM INCREASE OF PRODUCTION FROM THE OMBILIN COAL MINE,1953 .
Bandung:
Direktorat Batubara.
Gaya MLA
Mitchelll, D.W..
"PROPOSAL FOR A SHORET TERM INCREASE OF PRODUCTION FROM THE OMBILIN COAL MINE,1953".
Bandung:
Direktorat Batubara,
1953.
Batubara.