Assefa, Alemayehu, Mebratu Mulatu Bachore, and Tagesse Daniel. 2026. “The Effectiveness of Problem-Based Learning in Enhancing Learners’ English Language Skills: Meta-Analysis and Systematic Review”. Journal of Problem Based Learning in Higher Education 14 (1). https://doi.org/10.54337/ojs.jpblhe.v14i1.10569.