ISA, M.; WIDA YULIAR REZIKA. TOEFL Refreshment untuk Himpunan Mahasiswa Program Studi Teknik Perkeretaapian Politeknik Negeri Madiun. Swadaya: Jurnal Pengabdian Masyarakat, [S. l.], v. 4, n. 1, p. 49–67, 2026. DOI: 10.62265/swadaya.v4i1.661. Disponível em: https://journal.nubaninstitute.org/index.php/swadaya/article/view/661. Acesso em: 11 aug. 2026.