Hakim MS, Mawardi M, Wardani KW. THE IMPLEMENTATION OF PROBLEM-BASED LEARNING MODEL IN THEMATIC LEARNING FOR 4TH GRADE STUDENTS TO IMPROVE THE STUDENTS™ CRITICAL THINKING SKILLS. JH [Internet]. 2019 Jul. 23 [cited 2025 Jan. 31];10(1):43-7. Available from: http://103.242.233.34/index.php/handayani/article/view/14137