Gaya APA

simatupang, M., Divitt, J, F, M. (1990). Mineral development in Asia and the Pacific . Jakarta: Proceeding of the 2nd Asia Pacific mining conference.

Gaya MLA

simatupang, M.., Divitt, James, F., Mc. "Mineral development in Asia and the Pacific". Jakarta: Proceeding of the 2nd Asia Pacific mining conference, 1990. Textbook.