Prihandoko, Yogi, St. Y. Slamet, and Winarno Winarno. “COGNITIVE MORAL APPROACH TO CIVICS EDUCATION MATERIAL DEVELOPMENT IN THE ELEMENTARY SCHOOL”. Jurnal Kependidikan: Penelitian Inovasi Pembelajaran 1, no. 2 (December 8, 2017). Accessed May 15, 2025. https://jurnal.uny.ac.id/index.php/jk/article/view/15279.