Hikmah, A., Manurung, K. and Dewi, A.K. 2021. Developing Speaking Skill of Grade XI Students of SMA Negeri 1 Ampibabo through Problem Solving Method. ELS Journal on Interdisciplinary Studies in Humanities. 4, 4 (Dec. 2021), 413-423. DOI:https://doi.org/10.34050/elsjish.v4i4.18480.