Istikmal, Agus, M Marsito, and E Ernawati. “Implementation of Health Protocols in Efforts to Prevent Covid-19 at Islamic Boarding Schools Tambaksari Al Kamal Modern Kebumen Kuwarasan”. Prosiding University Research Colloquium (June 30, 2022): 643–660. Accessed May 1, 2025. https://www.repository.urecol.org/index.php/proceeding/article/view/2187.