Nainggolan DRM, Sudarman S, Subagio N. Application of LKPD Social Studies Based Collaborative Learning Model Structured Problem Solving Type in Improving the Completeness of Class VII Students’ Learning Outcomes at SMP Negeri 1 Tenggarong Seberang. escs [Internet]. 2022Dec.31 [cited 2024May3];2(2):307-1. Available from: https://jurnal.fkip.unmul.ac.id/index.php/escs/article/view/1920