Gaya APA
ASSOCIATION, T, I, M. (1988).
INDONESIAN MINERAL DEVELOPMENT DIGEST (FIRST EDITION).
Jakarta:
MINISTRY OF MINES AND ENERGY.
Gaya MLA
ASSOCIATION, THE, INDONESIAN, MINING.
"INDONESIAN MINERAL DEVELOPMENT DIGEST".
FIRST EDITION
Jakarta:
MINISTRY OF MINES AND ENERGY,
1988.
Textbook.