Moin Amena. Researching the Use of Problem-based Learning (PBL) Approach in English for Business Courses: The Case of Sultan Qaboos University. RHLLE-V2 [Internet]. 2022 Dec. 21 [cited 2026 Jun. 9];:61-76. Available from: https://stm.bookpi.org/RHLLE-V2/article/view/8934