Waruwu, Y. 2026. Enhancing Formal Academic Speaking through Problem-Based Learning in EFL Higher Education. Jo-ELT (Journal of English Language Teaching) Fakultas Pendidikan Bahasa & Seni Prodi Pendidikan Bahasa Inggris IKIP. 13, 1 (Jun. 2026), 153–165. DOI:https://doi.org/10.33394/jo-elt.v13i1.20047.