YANTI, S. Penerapan Model Pembelajaran Certainly of Response Index untuk Meningkatkan Aktivitas dan Hasil Belajar Pada Materi Perusahaan Jasa . Jumper: Journal of Educational Multidisciplinary Research, [S. l.], v. 3, n. 1, p. 85–98, 2024. DOI: 10.56921/jumper.v3i1.175. Disponível em: https://jurnal.catimoredansahabat.my.id/index.php/jumper/article/view/175. Acesso em: 26 sep. 2025.