Tipung Uvat R, Tanah Boleng D, Vera Tineke Lumowa S. THE INFLUENCE OF PROBLEM-BASED LEARNING AND GROUP INVESTIGATION LEARNING MODEL ON CRITICAL THINKING SKILLS AND STUDENTS’ LEARNING MOTIVATION. IJER [Internet]. 2021 Dec. 1 [cited 2024 Nov. 22];8(2):12-21. Available from: https://journal.unj.ac.id/unj/index.php/ijer/article/view/26996