Risnawati R, Arono A, Yunita W. Problem-Based Learning (PBL): How Does it Affect the Speaking Skills of Introvert and Extrovert Students?. JPBLHE [Internet]. 2025 Jun. 3 [cited 2025 Dec. 5];13(1). Available from: https://journals.aau.dk/index.php/pbl/article/view/8596