Khotimah, Nur, et al. “The Role of Non-Formal ECE Center Heads in Enhancing the Competency of Underqualified Early Childhood Educators”. AL-ISHLAH: Jurnal Pendidikan, vol. 18, no. 2, June 2026, pp. 3045-58, doi:10.35445/alishlah.v18i2.9078.