Pratiwi, A. and Ponidi, P. 2025. Changing Mangalehen Tuor Tradition in Mandailing Weddings: A Case Study from Damuli Pekan Village for Sociology Learning. Journal of Mathematics Instruction, Social Research and Opinion. 4, 3 (Jul. 2025), 647–660. DOI:https://doi.org/10.58421/misro.v4i3.604.