Gaya APA

INTERNASIONAL, N, L, &, A. (1988). REPUBLIC OF INDONESIA DEPARTEMENT OF MINES AND ENEGERGY DUIRECTORATE GENERAL OF MINES . Indonesia: PT. PLN (Persero).

Gaya MLA

INTERNASIONAL, NOEL, LAURENCE, &, ASOCIATES. "REPUBLIC OF INDONESIA DEPARTEMENT OF MINES AND ENEGERGY DUIRECTORATE GENERAL OF MINES". Indonesia: PT. PLN (Persero), 1988. Textbook.