Putri, Dwi, Irfan Hidayat, and Yuli Gunawan. “Social Return on Investment of PT Badak NGL SALIN SWARA Program”. Economics Development Analysis Journal 11, no. 3 (August 12, 2022): 284-293. Accessed July 18, 2024. https://journal.unnes.ac.id/sju/edaj/article/view/58360.