Salmi, Salmi. “MENINGKATKAN HASIL BELAJAR EKONOMI MELALUI MODEL PEMBELAJARAN PROBLEM BASED LEARNING”. JURNAL HANDAYANI PGSD FIP UNIMED 9, no. 2 (January 10, 2019): 72–82. Accessed January 31, 2025. http://103.242.233.34/index.php/handayani/article/view/12022.