Ikhsan Mubarok. “KINSHIP SYSTEM AS WORD-OF-MOUTH MARKETING: A CASE STUDY OF ALUMNI NETWORKS AND STUDENT GUARDIANS IN ENHANCING THE REPUTATION OF ISLAMIC BOARDING SCHOOLS”. Proceedings of International Conference on Educational Management, vol. 3, no. 2, Dec. 2025, pp. 104-17, https://ejournal.uimsya.ac.id/index.php/picem/article/view/4699.