Nainggolan, D. R. M., S. Sudarman, and N. Subagio. “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”. Educational Studies: Conference Series, Vol. 2, no. 2, Dec. 2022, pp. 307-1, doi:10.30872/escs.v2i2.1920.