GUNAWAN, Tri. Problem based-learning supported flipped classroom approach to enhance collaborative skills. JIPSINDO (Jurnal Pendidikan Ilmu Pengetahuan Sosial Indonesia), [S. l.], v. 10, n. 2, p. 145–159, 2023. DOI: 10.21831/jipsindo.v10i2.61999. Disponível em: https://jurnal.uny.ac.id/index.php/jipsindo/article/view/61999. Acesso em: 15 may. 2025.