Burhanuddin, Burhanuddin, and Bincar Nasution. “Implementation of Inquiry-Based Learning (IBL) Through Ancient Tombs of Sultan Barumun Era to Enhance Historical Thinking Skills of MAN Barumun Students: A Qualitative Analysis”. International Journal of Community Service (IJCS) 5, no. 1 (November 26, 2025): 01–21. Accessed December 7, 2025. https://ejournal.ipinternasional.com/index.php/ijcs/article/view/1658.