APA Style

Ilyas, S., S.M. Tobing. (1994). Coal exploration development report . Jakarta: Triaryani.

Chicago Style

Ilyas, S., S.M. Tobing. Coal exploration development report. Jakarta: Triaryani, 1994. Text.

MLA Style

Ilyas, S., S.M. Tobing. Coal exploration development report. Jakarta: Triaryani, 1994. Text.

Turabian Style

Ilyas, S., S.M. Tobing. Coal exploration development report. Jakarta: Triaryani, 1994. Print.