JOENNA KASSIM, & WIRAWATI NGUI. (2025). DEVELOPING SPEAKING SKILLS THROUGH FLIPPED CLASSROOM AT A SECONDARY SCHOOL IN SABAH. MANU Jurnal Pusat Penataran Ilmu Dan Bahasa (PPIB), 36(1), 62–83. https://doi.org/10.51200/manu.v36i1.5599