F. F. Bustami, Sani Abdu Hamidullah, Saiful Anwar, Saepul Anwar, and Syarifah, “The Pedagogy of Hidden Curriculum in Pesantren: Institutional Culture and Character Internalization in Basic Advanced Course (KMD) Programs”, PIJAR, vol. 4, no. 2, pp. 871–887, Apr. 2026.