Karnaen, A., Hakim As-Shidqi, and Akrim Mariyat. “The Policy of Moral Education on KH Imam Zarkasyi’s Thought at Gontor Modern Islamic Boarding School”. Jurnal Pendidikan Islam, vol. 3, no. 1, Sept. 2023, pp. 163-82, doi:10.14421/jpi.2014.31.163-182.