Imtiyaz, Ahmad Rais, Akasyah Rizwan Kurnia Putra, Erland Zuhdi Karo Karo, Fatkhurrohkman Nawawi, and Dwi Desi Yayi Tarina. “Wanprestasi Dalam Jual Beli Batubara”. Indonesian Research Journal on Education 5, no. 4 (June 5, 2025): 14 –. Accessed October 6, 2026. https://irje.org/irje/article/view/2818.