Gaya APA

Perdana, P, A, M. (1987). Ampalit Alluvial Gold Project Feasibility Study Summary . Jakarta: PT. Ampalit Mas Perdana.

Gaya MLA

Perdana, PT., Ampalit, Mas. "Ampalit Alluvial Gold Project Feasibility Study Summary". Jakarta: PT. Ampalit Mas Perdana, 1987. Text.