JANUARTI, Lusi; ‘ARDHUHA, Jannatin; VERAWATI, Ni Nyoman Sri Putu; GUNAWAN, Gunawan. Validitas Perangkat Pembelajaran Berbasis Model Kooperatif Tipe Group Investigation untuk Meningkatkan Hasil Belajar Fisika Peserta Didik. Empiricism Journal, [S. l.], v. 4, n. 1, p. 1–7, 2023. DOI: 10.36312/ej.v4i1.1107. Disponível em: https://journal-center.litpam.com/index.php/empiricism/article/view/1107. Acesso em: 29 jan. 2026.