ADAM, Sutisno; MAGFIRAH, Sulmi. Implementation of Problem-Based Learning Model in TOEFL Preparation Program at Khairun University. ELS Journal on Interdisciplinary Studies in Humanities, [S. l.], v. 4, n. 4, p. 424–430, 2021. DOI: 10.34050/elsjish.v4i4.18611. Disponível em: http://journal.unhas.ac.id/index.php/jish/article/view/18611. Acesso em: 5 feb. 2025.