Ningtyas AP. MEDIATING ROLE OF COLLABORATION COMPETENCE IN PROJECT-BASED LEARNING AND PROBLEM SOLVING. ecotechnopreneur [Internet]. 2026 Jun. 30 [cited 2026 Sep. 7];5(2):202-2. Available from: https://www.azramedia-indonesia.azramediaindonesia.com/index.php/ecotechnopreneur/article/view/2804