Burhanuddin, B. and Nasution, B. 2025. 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, 1 (Nov. 2025), 01–21. DOI:https://doi.org/10.55299/ijcs.v5i1.1658.