Hakim, Muhammad Syaiful, Mawardi Mawardi, and Krisma Widi Wardani. “THE IMPLEMENTATION OF PROBLEM-BASED LEARNING MODEL IN THEMATIC LEARNING FOR 4TH GRADE STUDENTS TO IMPROVE THE STUDENTS™ CRITICAL THINKING SKILLS”. JURNAL HANDAYANI PGSD FIP UNIMED 10, no. 1 (July 23, 2019): 43–47. Accessed January 31, 2025. http://103.242.233.34/index.php/handayani/article/view/14137.