HIKMAH, A.; MANURUNG, K. .; DEWI, A. K. . Developing Speaking Skill of Grade XI Students of SMA Negeri 1 Ampibabo through Problem Solving Method. ELS Journal on Interdisciplinary Studies in Humanities, [S. l.], v. 4, n. 4, p. 413-423, 2021. DOI: 10.34050/elsjish.v4i4.18480. Disponível em: https://journal.unhas.ac.id/index.php/jish/article/view/18480. Acesso em: 2 may. 2024.