Harahap, Suheri, R. Hamdani Harahap, and Mohd Roslan Moh Nor. “Customary Negotiation and Islamic Environmental Law: Human-Nature Relations in the Batak Angkola Community, South Tapanuli, Indonesia”. Ijtihad : Jurnal Wacana Hukum Islam dan Kemanusiaan 26, no. 1 (June 30, 2026): 1–36. Accessed August 18, 2026. https://ejournal.uinsalatiga.ac.id/index.php/ijtihad/article/view/6135.