Purwanto J, Gunawan G, Kusuma JW. IMPROVING PERSONAL RESILIENCE AND STUDENT LEARNING ACHIEVEMENT THROUGH PROBLEM-BASED INSTRUCTION LEARNING. ECO EDU ENTRE [Internet]. 2023Apr.4 [cited 2025Nov.14];3(1):200-6. Available from: http://ije3.esc-id.org/index.php/home/article/view/135