Soeparno, Koentjoro, and Budi Andayani. 2023. “Two of the Four Great Thinkers from Yogyakarta: Ki Hadjar Dewantara and Ki Ageng Suryomentram, Humanitarian Fighter and Initiator of Cultured Character Education”. International Conference on Indigenous Psychology and Culture 1 (1):1-11. https://seminar.ustjogja.ac.id/index.php/icipc/article/view/788.