Putri Sitanggang, Raysyah, and Indah Pratiwi. “Ecoprint Sekolah Bersih: Penguatan Karakter Siswa Sanggar Belajar Muhammadiyah Kepong, Malaysia”. Jurnal Pemberdayaan Umat 4, no. 1 (February 10, 2025): 25–36. Accessed July 8, 2025. https://penerbitgoodwood.com/index.php/JPU/article/view/4685.