“SIRTU PRODUCTION DETERMINATION BASED ON MINING BREAK-EVEN POINT AT PT. MANOKWARI LEMON ISLAND: PENENTUAN PRODUKSI SIRTU BERDASARKAN TITIK IMPAS PENAMBANGAN PADA PT. PULAU LEMON MANOKWARI”. 2023. JISTECH: Journal of Information Science and Technology 7 (1). http://jistech.unipa.ac.id/index.php/istech/article/view/131.