Dewirahmadanirwati, Ramadhan S, Ardi H. Constructing a Problem-Based Learning Framework for Speaking Proficiency: An Andragogical Perspective on Multiethnic Learners. Forum Linguist. Stud. [Internet]. 2025 Nov. 20 [cited 2025 Nov. 10];7(11):1402–1415. Available from: https://journals.bilpubgroup.com/index.php/fls/article/view/12152