TAUFIK QURAHMAN, M. Meningkatkan Kemampuan Pemecahan Masalah Kalkulus Lanjut Melalui Pembelajaran Kooperatif Tipe Co-Op Co-Op. Cakrawala: Jurnal Pendidikan, [S. l.], v. 11, n. 1, p. 32–37, 2017. DOI: 10.24905/cakrawala.v11i1.106. Disponível em: https://cakrawala.upstegal.ac.id/index.php/cakrawala/article/view/106. Acesso em: 20 dec. 2025.