Saputra, Ais, and Muhammad Zaenul Lael. “Operational Sustainability of Education: Analysis of Safe Facilities and Infrastructure Standards”. Proceeding International Conference on Religion, Science and Education 4 (April 9, 2025): 611–617. Accessed May 1, 2026. https://sunankalijaga.org/prosiding/index.php/icrse/article/view/1372.