Risnajayanti, Risnajayanti, Irwan Akib, and Amirah Mawardi. “Islamic Spiritual Leadership in Early Childhood Education: A Systematic Review of Models for Quality and Character Development”. PPSDP International Journal of Education 4, no. 2 (December 8, 2025): 837–853. Accessed July 2, 2026. https://ejournal.ppsdp.org/pijed/article/view/770.