Friska Salsabilla, Serli Sabela, Samadiana Br Sembiring, and Risdo Hotray Sinaga. 2024. “Obstacles and Solutions in Implementing Active Learning Strategies in Geography Learning Materials at SMA Negeri 11 Medan”. Jurnal Multidisiplin Sahombu 4 (02):472-75. https://ejournal.seaninstitute.or.id/index.php/JMS/article/view/5812.