“Productive Waqf Management Model to Improve Education System at the Raudhatul Ulum Islamic Boarding School in Lumajang”. Syaikhuna: Jurnal Pendidikan Dan Pranata Islam, vol. 14, no. 02, Oktober 2023, hlm. 271-80, https://doi.org/10.62730/syaikhuna.v14i02.7849.