Sitorus R, Suhono S. Pengaruh Harga Batubara Acua Dan Volume Penjualan Terhadap Laba Bersih. jiwp [Internet]. 23Dec.2025 [cited 1Jun.2026];11(12.C):370-9. Available from: https://www.jurnal.peneliti.net/index.php/JIWP/article/view/12253