Muhamad Zainul Umam (2025) “The Contribution of Pesantren Education to the Internalization of Moral Values: A Case Study of Raudlatul Muta’allimin Kudus”, Harmony Philosophy: International Journal of Islamic Religious Studies and Sharia, 2(3), pp. 01–08. doi: 10.70062/harmonyphilosophy.v2i3.212.