Tulus Sajiwo, Ujang Sumarwan, and Yudha Heryawan Asnawi. “Natural Gas Sales Optimization Strategy of PT XYZ in East Java”. Jurnal Aplikasi Bisnis dan Manajemen 8, no. 3 (September 30, 2022): 823. Accessed March 28, 2026. https://journal.ipb.ac.id/jabm/article/view/41167.