SARI, Irfa Diana; WILANDARI, Rahmi; PRAKOSO, Albrian Fiky. Penerapan Problem Based Learning (PBL) dengan Media Amplop Misteri untuk Meningkatkan Hasil Belajar Peserta Didik pada Materi Alat Pembayaran di Kelas X-1 SMA Negeri 21 Surabaya. Innovative: Journal Of Social Science Research, [S. l.], v. 3, n. 2, p. 7211–7219, 2023. Disponível em: https://j-innovative.org/index.php/Innovative/article/view/1073. Acesso em: 11 jul. 2026.