Purba, M. Z. W., and J. Naldo. “History and Contributions of Hadharatul Islamiyah Islamic Boarding School in Community Development in Sipispis District Serdang Bedagai Regency, 2009-2023”. Yupa: Historical Studies Journal, Vol. 8, no. 1, Feb. 2024, pp. 62-70, doi:10.30872/yupa.v8i1.3176.