Fajar Tirtafadhitya, Febry Chairuddin Damien, Eileen Rosabel Renaningtyas, and Juliater Simarmata. 2025. “Market Expansion Strategy for Copper Slag Exports of PT Freeport Indonesia”. Jurnal Ilmu Multidisiplin 4 (2):527-39. https://doi.org/10.38035/jim.v4i2.861.