Sitorus, Resty, and Suhono Suhono. 2025. “Pengaruh Harga Batubara Acua Dan Volume Penjualan Terhadap Laba Bersih”. Jurnal Ilmiah Wahana Pendidikan 11 (12.C), 370-79. https://www.jurnal.peneliti.net/index.php/JIWP/article/view/12253.