Tipung Uvat , Rita, Didimus Tanah Boleng, and Sonja Vera Tineke Lumowa. “THE INFLUENCE OF PROBLEM-BASED LEARNING AND GROUP INVESTIGATION LEARNING MODEL ON CRITICAL THINKING SKILLS AND STUDENTS’ LEARNING MOTIVATION”. IJER - INDONESIAN JOURNAL OF EDUCATIONAL REVIEW 8, no. 2 (December 1, 2021): 12–21. Accessed November 22, 2024. https://journal.unj.ac.id/unj/index.php/ijer/article/view/26996.