IBRAHIM, Ibrahim; AKMAL, Nurul; MARWAN, Marwan. Problem-based Learning and Student Critical Thinking to Improve Learning Achievement at Private Universities in Aceh. AL-ISHLAH: Jurnal Pendidikan, [S. l.], v. 13, n. 2, p. 1142–1151, 2021. DOI: 10.35445/alishlah.v13i2.698. Disponível em: https://www.alishlah.ahfpublishing.id/alishlah/article/view/698. Acesso em: 11 oct. 2026.