Sutrisna, Gede, and Luh Putu Artini. “Does Problem-Based Learning Affect Students’ Speaking Skill and Attitude Toward ELL?”. RETORIKA: Jurnal Ilmu Bahasa 6, no. 2 (October 29, 2020): 131-138. Accessed July 18, 2024. https://www.ejournal.warmadewa.ac.id/index.php/jret/article/view/2315.