1.
Anindya Fajarini, Fikri Apriyono. Pengembangan Bahan Ajar IPS Berbasis 21st Century Skills (4 Learning Skills) Bagi Siswa SMP. JPPI [Internet]. 2024 Dec. 30 [cited 2026 Oct. 18];18(2):151-63. Available from: https://ejournalstaging.unikama.ac.id/index.php/JPPI/article/view/10864